View source for Charles M. Schulz–Sonoma County Airport

{{Short description|Municipal airport in Sonoma County, California, United States}}
{{Use mdy dates|date=February 2015}}
{{Infobox airport
| name              = {{nowrap|Charles M. Schulz–Sonoma County<br />Airport}}
| nativename        = {{small|(former Santa Rosa Army Airfield)}}
| image             = Charles M. Schulz - Sonoma County Airport (logo).png
| image-width       = 150
| image2            = Sonoma County Airport - Topo.jpg
| image2-width      = 250
| caption2          = [[USGS]] 2006 [[orthophoto]]
| IATA              = STS
| ICAO              = KSTS
| FAA               = STS
| image_map         = STS - FAA airport diagram.gif
| image_mapsize     = 175
| image_map_caption = FAA airport diagram
| mapframe          = yes
| mapframe-zoom     = 10
| mapframe-wikidata = yes
| coordinates       = {{coord|38|30|32|N|122|48|46|W|display=inline,title}}
|operating_base     = [[Avelo Airlines]]<ref>{{Cite web|date=January 30, 2024 |title=Avelo Airlines Announces New Base at Bay Area's Sonoma County Airport |url=https://www.prnewswire.com/news-releases/avelo-airlines-announces-new-base-at-bay-areas-sonoma-county-airport-302048161.html|website= PRNewswire |access-date=January 30, 2024}}</ref>
| type              = Public
| owner-oper        = Sonoma County DOT
| location          = Sonoma County, near [[Santa Rosa, California]]
| city-served       = [[Sonoma County, California]]
| elevation-f       = 129
| elevation-m       = 39
| website           = {{URL|https://sonomacountyairport.org/}}
| r1-number         = 02/20
| r1-length-f       = 5,202
| r1-length-m       = 1,586
| r1-surface        = [[Asphalt concrete|Asphalt]]
| r2-number         = 14/32
| r2-length-f       = 6,000
| r2-length-m       = 1,829
| r2-surface        = Asphalt
| stat-year         = 2023
| stat1-header      = Aircraft operations
| stat1-data        = 82,710
| stat2-header      = Based aircraft
| stat2-data        = 334
| stat3-header      = Total passengers
| stat3-data        = 641,178
| footnotes         = Source: [[Federal Aviation Administration]]<ref name=FAA>{{FAA-airport|ID=STS|use=PU|own=PU|site=02260.*A}}, effective May 18, 2024.</ref><ref>{{cite web|url=https://sonomacountyairport.org/about-sts/passenger-numbers|title=2023 Passenger Numbers Data for Sonoma Airport|website=Sonoma County Airport.org|accessdate= May 19, 2024}}</ref>
}}

'''Charles M. Schulz–Sonoma County Airport''' {{airport codes|STS|KSTS|STS}} is a [[domestic airport]] located {{convert|7|miles}} northwest of downtown [[Santa Rosa, California]], in [[Sonoma County, California]], United States.<ref name=FAA /><ref>{{cite gnis |type=retired|id=1653988 |name=Sonoma County Airport |access-date=2009-05-04}}</ref>

The airport is named after [[Charles M. Schulz]], the famed cartoonist of the ''[[Peanuts]]'' comic strip, who lived in Santa Rosa for more than 30 years. The airport's logo features [[Snoopy]] in [[World War I]] flying-ace attire atop his doghouse.

==History==

===Military use===
In the 1930s Santa Rosa had a small municipal airfield owned by [[Richfield Oil Corporation]] next to the [[Redwood Highway]] about 6 miles southeast of the present airport. Use of the 3,000-foot sod runway at the earlier airfield was discontinued during [[World War II]] as facilities at the present airport improved.<ref>{{cite web |url=http://www.airfields-freeman.com/CA/Airfields_CA_SantaRosa.html#santarosamuni |title=Santa Rosa Municipal Airport, Santa Rosa, CA |last=Freeman |first=Paul |access-date=2011-12-13 |work=[[Tripod.com]] |url-status=dead |archive-url=https://web.archive.org/web/20110629063441/http://www.airfields-freeman.com/CA/Airfields_CA_SantaRosa.html#santarosamuni |archive-date=June 29, 2011 |df=mdy-all }}</ref>

Opened in June 1942 and known as '''Santa Rosa Army Air Field''', the airfield was assigned to [[Fourth Air Force]] as a group and replacement training airfield. Known units assigned to Santa Rosa were:

* [[354th Fighter Group]], March–June 1943
* [[357th Fighter Group]], June–August 1943
* [[363d Fighter Group]], August–October 1943
* [[367th Fighter Group]], October–December 1943

The 478th Fighter Group was permanently assigned to Santa Rosa in December 1943 and began training replacement pilots, who were sent to combat units overseas after graduation.

The airfield was inactivated on January 31, 1946 during winter and turned over to the War Assets Administration for eventual conversion to a civil airport.

===Airline flights===
From the late-1940s to the mid-1970s [[Pacific Air Lines|Southwest Airways]] and successors [[Pacific Air Lines]], Air West and [[Hughes Airwest]] served Santa Rosa. Southwest Airways [[Douglas DC-3]]s followed by Pacific, Air West and Hughes Airwest [[Fairchild F-27]] turboprops mainly flew to [[SFO|San Francisco]] ([[SFO]]).  Pacific Air Lines had introduced F-27 aircraft on its Santa Rosa service by 1964 with these new propjets subsequently replacing the airline's [[Martin 4-0-4]] piston-powered aircraft on all of its flights into airport.<ref>{{Cite web |date=July 1, 1964 |title=Pacific Air Lines System Timetable |url=https://www.timetableimages.com/ttimages/complete/pc64/pc64-1.jpg |url-status=live |archive-url=https://web.archive.org/web/20230907091807/https://www.timetableimages.com/ttimages/complete/pc64/pc64-1.jpg |archive-date=September 7, 2023 |access-date=September 1, 2023 |website=Airline Timetable Images}}</ref><ref>{{Cite web |date=July 1, 1964 |title=Pacific Air Lines Schedule |url=https://www.timetableimages.com/ttimages/complete/pc64/pc64-3.jpg |url-status=live |archive-url=https://web.archive.org/web/20230901223750/https://www.timetableimages.com/ttimages/complete/pc64/pc64-3.jpg |archive-date=September 1, 2023 |access-date=September 1, 2023 |website=Airline Timetable Images}}</ref>  In 1967 Pacific was operating daily F-27 service on a roundtrip routing of [[Portland International Airport|Portland, OR]] - [[Del Norte County Airport|Crescent City]] - [[Arcata–Eureka Airport|Eureka/Arcata]] - Santa Rosa - [[San Francisco International Airport|San Francisco]].<ref>{{Cite web |date=Aug 1, 1967 |title=Pacific Southbound Service |url=https://www.timetableimages.com/ttimages/pc/pc6708/pc6708-2.jpg |url-status=live |archive-url=https://web.archive.org/web/20230901221923/https://www.timetableimages.com/ttimages/pc/pc6708/pc6708-2.jpg |archive-date=September 1, 2023 |access-date=September 1, 2023 |website=Airline Timetable Images}}</ref><ref>{{Cite web |date=August 1, 1967 |title=Pacific Northbound Service |url=https://www.timetableimages.com/ttimages/pc/pc6708/pc6708-3.jpg |url-status=live |archive-url=https://web.archive.org/web/20230907091838/https://www.timetableimages.com/ttimages/pc/pc6708/pc6708-3.jpg |archive-date=September 7, 2023 |access-date=September 1, 2023 |website=Airline Timetable Images}}</ref>  By 1968, one of the Air West F-27 flights serving the airport was operating a daily southbound routing of [[Redding Regional Airport|Redding]] - Santa Rosa - [[Oakland International Airport|Oakland]] - San Francisco.<ref>{{Cite web |date=July 1, 1968 |title=Air West Flight Schedule |url=https://www.timetableimages.com/ttimages/complete/rw68/rw68-7.jpg |url-status=live |archive-url=https://web.archive.org/web/20230907071829/https://www.timetableimages.com/ttimages/complete/rw68/rw68-7.jpg |archive-date=September 7, 2023 |access-date=September 1, 2023 |website=Airline Timetable Images}}</ref>  In the summer of 1972, Hughes Airwest was operating two nonstop F-27 flights every weekday to San Francisco.<ref>{{Cite web |date=July 1, 1972 |title=Hughes Airwest Route Map |url=https://www.departedflights.com/RW070172.html |url-status=live |archive-url=https://web.archive.org/web/20231016124634/http://www.departedflights.com/RW070172.html |archive-date=October 16, 2023 |access-date=September 1, 2023 |website=Departed Flights}}</ref><ref>{{Cite web |date=July 1, 1972 |title=Hughes Airwest timetable |url=https://www.departedflights.com/RW070172p14.html |url-status=live |archive-url=https://web.archive.org/web/20230901230247/https://www.departedflights.com/RW070172p14.html |archive-date=September 1, 2023 |access-date=September 1, 2023 |website=Departed Flights}}</ref> However, by 1975 Hughes Airwest was no longer serving Santa Rosa.<ref>{{Cite web |url=https://www.departedflights.com/RW070175.html |title=Hughes Airwest July 1, 1975 Route Map |access-date=September 1, 2023 |archive-date=September 1, 2023 |archive-url=https://web.archive.org/web/20230901231334/https://www.departedflights.com/RW070175.html |url-status=live }}</ref>

Commuter airlines flew STS to San Francisco ([[SFO]]) until 2001 as well as to San Jose (SJC) at various times. In 1969 [[Golden Pacific Airlines (1969-1973)]] was operating six roundtrip flights every weekday between the airport and SFO as well as direct flights to Eureka, Lake Tahoe, Reno, Stockton and Ukiah with [[Beechcraft 99]] commuter turboprops <ref>{{Cite web |date=Sep 1, 1969 |title=Golden Pacific Airlines Flight Schedules |url=https://www.timetableimages.com/ttimages/gg4/gg6909/gg6909-1.jpg |archive-url=https://web.archive.org/web/20230116213031/https://www.timetableimages.com/ttimages/gg4/gg6909/gg6909-1.jpg |archive-date=Jan 16, 2023 |website=Airline Timetable Images}} [https://www.timetableimages.com/ttimages/gg4/gg6909/gg6909-2.jpg Second page]</ref> During the mid and late 1970s Eureka Aero and successor [[Air Pacific (United States)]] operated [[de Havilland Canada DHC-6 Twin Otter]] service to Eureka, Oakland, Sacramento and San Francisco.<ref>{{Cite web |date=June 1, 1978 |title=Eureka Aero Flight Schedule |url=https://www.timetableimages.com/ttimages/ik1/ik7806/ik7806-1.jpg |url-status=live |archive-url=https://web.archive.org/web/20231006213346/https://www.timetableimages.com/ttimages/ik1/ik7806/ik7806-1.jpg |archive-date=October 6, 2023 |access-date=September 12, 2023 |website=Airline Timetable Images}} [https://www.timetableimages.com/ttimages/ik1/ik7806/ik7806-2.jpg Second page]</ref><ref>{{Cite web |date=March 15, 1979 |title=Air Pacific Flight Schedule |url=https://www.timetableimages.com/ttimages/ik1/ik7903/ik7903-1.jpg |website=Airline Timetable Images}} [https://www.timetableimages.com/ttimages/ik1/ik7903/ik7903-2.jpg Second page]</ref><ref>{{cite web |url=http://www.departedflights.com/IK041575.html |title=Eureka Aero route map, April 15, 1975 |website=Departed Flights |first=Karl L. |last=Swartz |access-date=December 18, 2020 |archive-date=June 18, 2021 |archive-url=https://web.archive.org/web/20210618090907/https://www.departedflights.com/IK041575.html |url-status=live }}</ref> In 1985 Westates Airlines [[Convair CV-580]] turboprops flew nonstop to [[LAX|Los Angeles]] for several months before ceasing operations; their July 1985 timetable listed 38 round trips a week between STS and LAX. Other turboprop flights included [[American Eagle (airline brand)|American Eagle]] [[Fairchild Swearingen Metroliner]]s operated by [[Wings West Airlines]] for [[American Airlines]] nonstop to SFO and San Jose ([[Norman Y. Mineta San Jose International Airport|SJC]]). In late 1989 American Eagle had three Metros a day to SFO and four a day to SJC.<ref name="oag89">{{cite book |chapter-url=http://www.departedflights.com/STS89intro.html |title=Official Airline Guide |chapter=Airlines and Aircraft Serving Santa Rosa Effective December 15, 1989 |via=Departed Flights |access-date=December 18, 2020 |archive-date=June 18, 2021 |archive-url=https://web.archive.org/web/20210618085326/https://www.departedflights.com/STS89intro.html |url-status=live }}</ref> In 1995 Reno Air Express was operating [[codeshare]] [[BAe Jetstream 31]] nonstop service from Eureka/Arcata, Reno and San Jose flown by [[Mid Pacific Air]] on behalf of [[Reno Air]].<ref name="oag95">{{cite book |chapter-url=http://www.departedflights.com/STS95intro.html |title=Official Airline Guide |chapter=Airlines and Aircraft Serving Santa Rosa Effective April 2, 1995 |via=Departed Flights |access-date=June 8, 2020 |archive-date=June 8, 2020 |archive-url=https://web.archive.org/web/20200608165534/http://www.departedflights.com/STS95intro.html |url-status=live }}</ref>

In the mid-1980s [[United Airlines]] entered into a [[code sharing]] agreement with [[WestAir]], a commuter airline that had previously served STS with [[Cessna 402]]s and [[de Havilland Canada DHC-6 Twin Otter]]s to San Francisco.<ref>{{cite book |chapter-url=http://www.departedflights.com/STS81intro.html |title=Official Airline Guide |chapter=Airlines and Aircraft Serving Santa Rosa Effective April 1, 1981 |via=Departed Flights |access-date=December 18, 2020 |archive-date=June 18, 2021 |archive-url=https://web.archive.org/web/20210618094049/https://www.departedflights.com/STS81intro.html |url-status=live }}</ref><ref>{{cite book |chapter-url=http://www.departedflights.com/STS85intro.html |title=Official Airline Guide |chapter=Airlines and Aircraft Serving Santa Rosa Effective February 15, 1985 |via=Departed Flights |access-date=December 18, 2020 |archive-date=June 18, 2021 |archive-url=https://web.archive.org/web/20210618081159/https://www.departedflights.com/STS85intro.html |url-status=live }}</ref> WestAir then began flying as [[United Express]] to SFO until 2001.<ref>{{cite news |url=https://www.latimes.com/archives/la-xpm-2001-nov-01-me-64261-story.html |title=United Express Discontinues Flights |date=November 1, 2001 |work=[[Los Angeles Times]] |access-date=December 16, 2011 |archive-date=July 15, 2012 |archive-url=https://web.archive.org/web/20120715022851/http://articles.latimes.com/2001/nov/01/local/me-64261 |url-status=live }}</ref> Westair operated its United Express service with [[Embraer EMB-110 Bandeirante]], [[Short 360]], [[BAe Jetstream 31]] and [[Embraer EMB-120 Brasilia]] turboprops.<ref name="oag89" /><ref>{{cite book |chapter-url=http://www.departedflights.com/STS91intro.html |title=Official Airline Guide |chapter=Airlines and Aircraft Serving Santa Rosa Effective October 1, 1991 |via=Departed Flights |access-date=December 18, 2020 |archive-date=January 27, 2021 |archive-url=https://web.archive.org/web/20210127230501/http://departedflights.com/STS91intro.html |url-status=live }}</ref><ref name="oag95" />

In 1989 jet service arrived in Santa Rosa when WestAir operating as United Express began flying four weekday [[BAe 146-200]] nonstops to Los Angeles, soon replaced with [[Embraer EMB-120 Brasilia]] turboprops with this service to [[LAX]] then ending in 1991. The Westair BAe 146s were Santa Rosa's only jet flights until [[Allegiant Air]] jets appeared on May 19, 2016 followed by [[American Eagle (airline brand)|American Eagle]] on February 16, 2017.<ref>{{cite news |url=https://www.pressdemocrat.com/article/news/american-airlines-debuts-service-from-sonoma-county-to-phoenix/ |title=American Airlines debuts service from Sonoma County to Phoenix |first=Derek |last=Moore |work=[[The Press Democrat]] |date=February 16, 2017 |access-date=December 18, 2020 |archive-date=June 22, 2021 |archive-url=https://web.archive.org/web/20210622035336/https://www.pressdemocrat.com/article/news/american-airlines-debuts-service-from-sonoma-county-to-phoenix/ |url-status=live }}</ref> WestAir formerly operated as [[Stol Air Commuter]] flying [[Britten-Norman Islander]]s and [[Trislander]]s to San Francisco. Stol Air Commuter had administrative offices in Santa Rosa. In June 2001 United Express operated by [[SkyWest Airlines]] was the only airline serving Santa Rosa with six Embraer EMB-120 Brasilia flights a day into the airport including four daily nonstops from Los Angeles (LAX) and two flights a day from San Francisco (SFO).<ref>{{Cite web |title=Airlines Serving Santa Rosa in June 2001 |url=https://www.departedflights2.com/airlines-serving-Santa-Rosa-in-june-2001/ |url-status=live |archive-url=https://web.archive.org/web/20230831214759/https://departedflights2.com/airlines-serving-Santa-Rosa-in-june-2001/ |archive-date=August 31, 2023 |access-date=August 31, 2023 |website=Departed Flights|date=August 23, 2023 }}</ref>  United Express then left Santa Rosa later in 2001 (and would not return until 2017) with the airport not having any scheduled passenger airline service for several years during the early and mid-2000s.

In March 2007 airline service resumed; [[Horizon Air]], a subsidiary of [[Alaska Airlines]], began flights to [[Seattle–Tacoma International Airport|Seattle/Tacoma]] and [[Los Angeles International Airport|Los Angeles]] operated with [[Bombardier Q400]] propjets. Horizon then added flights to [[Portland International Airport|Portland, Oregon]] in late 2007, to [[McCarran International Airport|Las Vegas]] in early 2008,<ref>{{cite news |work=[[The Press Democrat]] |url=http://www.pressdemocrat.com/article/20120325/BUSINESS/120329819 |title=Alaska Airlines service energizes Sonoma County airport |first=Steve |last=Hart |date=March 25, 2012 |access-date=December 20, 2012 |archive-date=March 29, 2012 |archive-url=https://web.archive.org/web/20120329073622/http://www.pressdemocrat.com/article/20120325/BUSINESS/120329819 |url-status=live }}</ref> and to [[San Diego International Airport|San Diego]] in mid 2012.

In early 2011 Alaska Airlines announced it would retire its Horizon brand,<ref>{{cite news |title=Horizon Air to 'retire its public brand' in favor of Alaska Air |first=Ben |last=Mutzabaugh |work=[[USA Today]] |date=January 26, 2011 |url=http://travel.usatoday.com/flights/post/2011/01/horizon-air-alaska/140151/1 |access-date=December 16, 2011 |archive-date=June 1, 2012 |archive-url=https://web.archive.org/web/20120601214136/http://travel.usatoday.com/flights/post/2011/01/horizon-air-alaska/140151/1 |url-status=live }}</ref> and all flights operated by Horizon now use the Alaska Airlines name. In June 2012 the airline ended flights from STS to Las Vegas.<ref>{{cite news |url=http://www.pressdemocrat.com/article/20120717/BUSINESS/120719616/1036/business?Title=Sonoma-County-San-Diego-flights-boost-Alaska-Air-ridership |archive-url=https://archive.today/20130131190908/http://www.pressdemocrat.com/article/20120717/BUSINESS/120719616/1036/business?Title=Sonoma-County-San-Diego-flights-boost-Alaska-Air-ridership |url-status=dead |archive-date=January 31, 2013 |title=Sonoma County-San Diego flights boost Alaska Air ridership |first=Robert |last=Digitale |date=July 17, 2012 |work=[[The Press Democrat]] }}</ref>

As part of an agreement between the airport, Alaska Airlines, and the local [[enotourism]] industry, it was announced in January 2012 that passengers were allowed to check a 12-bottle case of wine for free on all Alaska Airlines flights from the airport.<ref>{{cite news |date=January 20, 2012 |title=Tourism bureau, Alaska Air to jointly promote region |first=Dan |last=Verel |work=North Bay Business Journal |url=http://www.northbaybusinessjournal.com/47519/tourism-bureau-alaska-air-to-jointly-promote-region/ |access-date=December 20, 2012 |archive-date=January 28, 2012 |archive-url=https://web.archive.org/web/20120128160956/http://www.northbaybusinessjournal.com/47519/tourism-bureau-alaska-air-to-jointly-promote-region/ |url-status=live }}</ref>

Most Alaska Airlines flights from Santa Rosa are currently operated with 76-seat [[Embraer E175]] regional jets.<ref name="flightaware.com">{{cite web | url=https://flightaware.com/live/airport/KSTS | title=STS Schulz-Sonoma County Airport (STS/KSTS) | access-date=February 13, 2023 | archive-date=April 6, 2023 | archive-url=https://web.archive.org/web/20230406095133/https://flightaware.com/live/airport/KSTS | url-status=live }}</ref> The exception is mainline [[Boeing 737-800]] jetliner service nonstop to Seattle.<ref name="ReferenceA">{{Cite web |url=https://flightaware.com/live/findflight?origin=KSTS&destination=KSEA |title=Flight Finder ✈ Schulz-Sonoma County (KSTS) - Seattle-Tacoma Intl (KSEA) - FlightAware |access-date=May 4, 2023 |archive-date=May 4, 2023 |archive-url=https://web.archive.org/web/20230504150626/https://flightaware.com/live/findflight?origin=KSTS&destination=KSEA |url-status=live }}</ref>  Alaska E-175s currently fly nonstop to Burbank, Los Angeles, Orange County, Portland, San Diego, and Seattle.<ref name="alaskaair.com">{{cite web |url=https://www.alaskaair.com/en/flights-from-santa-rosa |title=Flights from Santa Rosa |website=Alaska Airlines}}</ref>

===New jet service===
In March 2016, [[Allegiant Air]] announced it would begin flying [[McDonnell Douglas MD-83]]s nonstop to [[Las Vegas]] [[McCarran International Airport]] and nonstop to [[Phoenix-Mesa Gateway Airport]] (IWA).<ref name="allegiantsts">{{cite news |last=Mutzabaugh |first=Ben |date=March 8, 2016 |url=https://www.usatoday.com/story/travel/flights/todayinthesky/2016/03/08/fast-growing-allegiant-adds-3-new-cities-22-new-routes/81459670/ |title=Fast-growing Allegiant adds 3 new cities, 22 new routes |work=USA Today |access-date=March 8, 2016 |archive-date=March 8, 2016 |archive-url=https://web.archive.org/web/20160308113134/http://www.usatoday.com/story/travel/flights/todayinthesky/2016/03/08/fast-growing-allegiant-adds-3-new-cities-22-new-routes/81459670/ |url-status=live }}</ref> The Las Vegas flight began on May 19, 2016 and the Phoenix flight several days later. At the time, the MD-83 was the largest airliner ever scheduled to Santa Rosa; as of October 19, 2016, Allegiant switched from the 166 seat MD-83 to the 155 seat [[Airbus A319]]. Allegiant ended flights to Phoenix-Mesa on January 2, 2017 and to Las Vegas on June 30, 2017 and no longer serves Santa Rosa.

In October 2016, [[American Airlines]] announced it would begin nonstop service between Santa Rosa and its hub in Phoenix (PHX) on February 16, 2017. The daily code share flight was being operated by [[SkyWest Airlines]] as [[American Eagle (airline brand)|American Eagle]] with [[Canadair CRJ-700]]s. American Eagle then added a second nonstop CRJ-700 roundtrip flight to Phoenix and currently operates  one [[Canadair CRJ-900]] roundtrip flight per day between Phoenix and Santa Rosa.<ref name="aa">{{cite web |url=https://www.aa.com |url-status=dead |archive-url=https://web.archive.org/web/19991128123859/http://www.aa.com/ |archive-date=November 28, 1999 |title=American Airlines Home Page--AA.COM-- AIRLINE RESERVATIONS AND AIRFARE SPECIALS}}</ref> American Eagle announced it would begin flying [[Embraer 175]]s nonstop to Los Angeles ([[LAX]]) effective May 3, 2019 and nonstop to Dallas/Fort Worth ([[Dallas/Fort Worth International Airport|DFW]]) effective June 6, 2019. American Eagle currently operates nonstop jet flights to PHX and seasonally to DFW from Santa Rosa.<ref name="aa"/>

In February 2017, [[United Express]] announced their return to Santa Rosa with thrice daily service to the [[United Airlines]] hub in San Francisco ([[San Francisco International Airport|SFO]]). The flights began on June 8, 2017; [[SkyWest Airlines]] [[Canadair CRJ-200]]s operated the [[code sharing]] flights for United. United Express announced it would begin nonstop CRJ-200 regional jet flights to Denver ([[Denver International Airport|DEN]]) on March 8, 2019.<ref>{{cite web |url=https://www.united.com |url-status=dead |archive-url=https://web.archive.org/web/20000407200225/http://united.com/ |archive-date=April 7, 2000 |title=United Airlines}}</ref> United suspended all service at the Sonoma County airport on November 1, 2020 due to the [[COVID-19 pandemic]]. While service was resumed temporarily to SFO on August 1, 2021, United indefinitely suspended all service to Santa Rosa (including United Express) on November 1, 2022.<ref>{{cite web |url=https://www.northbaybusinessjournal.com/article/news/united-airlines-to-suspend-service-at-sonoma-county-airport-new-airline-de/ |first=Cheryl |last=Sarfaty |work=North Bay Business Journal |date=July 15, 2022 |access-date=August 27, 2024 |title=United Airlines to suspend service at Sonoma County airport; new Santa Rosa flights debut}}</ref>

In March 2017, [[Sun Country Airlines]] announced seasonal nonstop service between Santa Rosa and [[Minneapolis/St. Paul International Airport]], to operate from late summer until late fall.<ref>{{cite web |url=https://www.suncountry.com/About/News/2017-03-08.html |title=Sun Country Airlines Announces New Service To Santa Rosa/Sonoma County, California, And Austin, Texas |website=Sun Country Airlines |date=March 8, 2017 |url-status=dead |archive-url=https://web.archive.org/web/20170312033030/https://www.suncountry.com/About/News/2017-03-08.html |archive-date=March 12, 2017 |df=mdy-all }}</ref> Sun Country was operating weekly 162 seat [[Boeing 737-800]]s from August 24, 2017 through December 3, 2017, connecting via Minneapolis/St. Paul to [[Boston]], [[New York City|New York]] [[John F. Kennedy Airport]] and [[Washington Reagan National Airport]]. Sun Country then continued to operate from the airport but had ended all service to [[Ronald Reagan Washington National Airport]] and was serving Washington [[Dulles Airport]] instead at the time.<ref name="sunc">{{cite web |url=https://www.suncountry.com/ |title=Sun Country Airlines |access-date=March 8, 2017 |archive-date=May 29, 2016 |archive-url=https://web.archive.org/web/20160529021234/http://www.suncountry.com/ |url-status=live }}</ref> In May 2018 [[Sun Country Airlines]] made a surprise announcement that it would be adding a new seasonal destination from Santa Rosa with nonstop flights between STS and Las Vegas (LAS) in addition to its seasonal nonstop service between the airport and MSP. The Sun Country fleet is composed of [[Boeing 737-700]]s and [[737-800]]s, which were the largest aircraft types serving the airport at the time.<ref name="sunc"/> Sun Country ceased serving Santa Rosa in early 2020.<ref>{{cite news |url=https://www.pressdemocrat.com/article/business/sun-country-airlines-exits-sonoma-county-airport-ending-minneapolis-las-v/ |title=Sun Country Airlines exits Sonoma County airport, ending Minneapolis, Las Vegas flights |first=Kevin |last=Fixler |work=The Press Democrat |date=February 27, 2020 |access-date=August 11, 2020 |archive-date=July 6, 2020 |archive-url=https://web.archive.org/web/20200706053515/https://www.pressdemocrat.com/article/business/sun-country-airlines-exits-sonoma-county-airport-ending-minneapolis-las-v/ |url-status=live }}</ref>

[[Avelo Airlines]] began nonstop service to the [[Hollywood Burbank Airport]] (BUR) in the [[Los Angeles]] area on April 28, 2021 and then subsequently added nonstop flights to Las Vegas with [[Boeing 737-800]] mainline jetliners which are currently the largest aircraft type serving Santa Rosa in scheduled passenger service.<ref>{{cite web |url=https://www.aveloair.com/ |title=Avelo Airlines &#124; Official Site &#124; Book Now and Save |publisher=Aveloair.com |date= |accessdate=2022-05-09 |archive-date=April 9, 2021 |archive-url=https://web.archive.org/web/20210409155332/https://www.aveloair.com/ |url-status=live }}</ref> Avelo also operates [[Boeing 737-700]] jetliners into the airport.<ref>{{Cite web |url=https://www.flightaware.com/live/airport/KSTS |title=STS Schulz-Sonoma County Airport (STS/KSTS) - FlightAware |access-date=September 1, 2023 |archive-date=September 1, 2023 |archive-url=https://web.archive.org/web/20230901215046/https://www.flightaware.com/live/airport/KSTS |url-status=live }}</ref>  [[Alaska Airlines]] has since begun nonstop jet service from the airport to BUR as well.<ref>https://www.alaskaair.com {{Webarchive|url=https://web.archive.org/web/20150709214043/https://www.alaskaair.com/ |date=July 9, 2015 }}, Where we fly</ref> Avelo has announced it will establish a base in Santa Rosa with two 737 jet aircraft to be based at the airport as well as expanding its nonstop service from STS in early May 2024 to several new destinations in the western U.S. <ref>{{cite web | url=https://www.aveloair.com/company-news/avelo-airlines-announces-new-base-at-bay-area-sonoma-county-airport | title=Avelo Airlines Announces New Base at Bay Area's Sonoma County Airport | date=January 30, 2024 }}</ref>

With the retirement of all [[Bombardier Q400]] turboprop aircraft from the [[Alaska Airlines]] fleet in late January 2023, all Alaska Airlines flights from Santa Rosa are currently operated either with [[Embraer E175]] regional jets or with mainline [[Boeing 737-800]] jetliners.<ref>{{cite web | url=https://news.alaskaair.com/alaska-airlines/with-the-e175-flying-horizons-future-we-bid-farewell-to-the-q400/ | title=With the E175 flying Horizon's future, we bid farewell to the Q400 | date=January 27, 2023 | access-date=February 13, 2023 | archive-date=February 13, 2023 | archive-url=https://web.archive.org/web/20230213213306/https://news.alaskaair.com/alaska-airlines/with-the-e175-flying-horizons-future-we-bid-farewell-to-the-q400/ | url-status=live }}</ref><ref name="ReferenceA"/>

==Facilities==
[[File:Charles M. Schulz–Sonoma County Airport Helper.jpg|thumb|Information desk at airport terminal, a reference to [[Lucy van Pelt]]'s Psychiatric Help booth]]The airport covers {{convert|1,125|acre|ha}} at an [[elevation]] of 129 feet (39&nbsp;m). It has two [[Asphalt concrete|asphalt]] [[runway]]s: 02/20 is 5,202 by 100 feet (1,586 x 30&nbsp;m) and 14/32 is 6,000 by 150 feet (1,829 x 46&nbsp;m).<ref name=FAA />

In the year ending December 31, 2023 the airport had 82,710 aircraft operations, average 226 per day: 79% [[general aviation]], 11% [[air taxi]], 10% airline and <1% military. 334 aircraft were then based at this airport: 263 single-engine, 35 multi-engine, 22 jet, and 14 [[helicopter]].<ref name=FAA />

In August 2013 the airport started a project to decouple the ends of the two runways and extend runway 14/32 by 885 feet, to 6000 feet and extend runway 02/20 by 200 feet, to 5202 feet. This project was scheduled for completion in November 2014.<ref>{{cite web |url=http://stsrunwayproject.org/general-information|title=General Information |website=STS Runway Project |publisher=Sonoma County Airport|archive-url=https://web.archive.org/web/20140222053443/http://stsrunwayproject.org/general-information|archive-date=February 22, 2014 }}</ref><ref>{{cite news |url=http://www.pressdemocrat.com/article/20140105/articles/140109813 |title=Sonoma County airport expansion expected to be completed before next winter |last=Brown |first=Matt |work=The Press Democrat |date=January 5, 2014 |access-date=2014-02-04 |archive-date=February 21, 2014 |archive-url=https://web.archive.org/web/20140221154947/http://www.pressdemocrat.com/article/20140105/articles/140109813 |url-status=live }}</ref>

The influx of new passengers in the late 2010s left existing airport facilities under severe strain. As a stopgap solution, the airport invested in a $4-million "tent" to serve as gate 2, which opened on October 22, 2021.<ref>{{cite web|last=Airport|first=Charles M. Schulz-Sonoma County|date=2020-10-28|title=New Modular Gate 2 Now Open at Charles M. Schulz — Sonoma County Airport|url=https://sonomacountyairport.org/new-modular-gate-2-now-open/|access-date=2021-06-04|website=Charles M. Schulz Sonoma County Airport|language=en-US|archive-date=June 4, 2021|archive-url=https://web.archive.org/web/20210604101036/https://sonomacountyairport.org/new-modular-gate-2-now-open/|url-status=live}}</ref> This has allowed the airport to double the area for outbound passenger seating, open a second passenger screening lane with [[TSA PreCheck]] capabilities, and replace portable restrooms with permanent units.<ref>{{cite web|date=2020-10-31|title=Sonoma County airport completes $4 million passenger tent project|url=https://www.pressdemocrat.com/article/industrynews/sonoma-county-airport-finishes-4-million-passenger-tent-project/|access-date=2021-06-04|website=Santa Rosa Press Democrat|language=en-US|archive-date=June 4, 2021|archive-url=https://web.archive.org/web/20210604101040/https://www.pressdemocrat.com/article/industrynews/sonoma-county-airport-finishes-4-million-passenger-tent-project/|url-status=live}}</ref>

As a more permanent solution, the airport has begun construction on an all-new terminal building. In the initial plan, the new terminal would add 19,000 square feet of new space at a cost of $20 million.<ref name="northbaybusinessjournal1">{{cite web|date=2020-11-12|title=Santa Rosa airport $31M new terminal project finally takes off|url=https://www.northbaybusinessjournal.com/article/industrynews/sonoma-county-airport-begins-construction-on-terminal-improvement-project/|access-date=2021-06-04|website=The North Bay Business Journal|language=en-US|archive-date=June 4, 2021|archive-url=https://web.archive.org/web/20210604101037/https://www.northbaybusinessjournal.com/article/industrynews/sonoma-county-airport-begins-construction-on-terminal-improvement-project/|url-status=live}}</ref> However, as passenger growth surpassed projections, the project was expanded so that the new terminal would be 40,000 square feet (33,000 square feet of new space and 7,000 of renovated space) at a cost of $31 million.<ref>{{cite web|date=2020-11-18|title=$31 million renovation project begins at Santa Rosa airport. See what's coming|url=https://www.pressdemocrat.com/article/news/sonoma-county-airport-31-million-terminal-expansion-project-begins/|access-date=2021-06-04|website=Santa Rosa Press Democrat|language=en-US|archive-date=June 4, 2021|archive-url=https://web.archive.org/web/20210604101037/https://www.pressdemocrat.com/article/news/sonoma-county-airport-31-million-terminal-expansion-project-begins/|url-status=live}}</ref> It will include a new gate 1 (replacing the old modular facility), additional space for concessions, an outdoor patio with seating and dining, a two new baggage claim systems, relocation of rental car desks, and a new ticketing lobby. Additionally, it will include space for two passenger screening lines, allowing them to be relocated from the gate 2 tent.<ref>{{cite web|last=Airport|first=Charles M. Schulz-Sonoma County|date=2020-11-09|title=Terminal Improvement and Modernization Project at Charles M. Schulz — Sonoma County Airport|url=https://sonomacountyairport.org/terminal-improvement-and-modernization-project/|access-date=2021-06-04|website=Charles M. Schulz Sonoma County Airport|language=en-US|archive-date=June 4, 2021|archive-url=https://web.archive.org/web/20210604101038/https://sonomacountyairport.org/terminal-improvement-and-modernization-project/|url-status=live}}</ref> The terminal broke ground in late 2020 and opened in November 2022, with the full airport modernization project concluding in August 2023.<ref name="northbaybusinessjournal1"/><ref>{{Cite web |date=2023-08-24 |title=Sonoma County airport unveils terminal upgrades. Here's what is new |url=https://www.pressdemocrat.com/article/north-bay/sonoma-county-airport-celebrates-completion-of-terminal-announces-new-addi/ |access-date=2023-08-28 |website=Santa Rosa Press Democrat |language=en-US |archive-date=August 28, 2023 |archive-url=https://web.archive.org/web/20230828043816/https://www.pressdemocrat.com/article/north-bay/sonoma-county-airport-celebrates-completion-of-terminal-announces-new-addi/ |url-status=live }}</ref>

===Ground transportation===
The [[U.S. Route 101 in California|U.S. 101]] freeway is accessible to the airport via Airport Boulevard. Both short-term and long-term parking is available. Long-term parking is split into two lots within walking distance to the north and southeast of the terminal.<ref>{{cite web|url=https://sonomacountyairport.org/passengers/parking/|title=Parking|website=Sonoma County Airport|access-date=March 29, 2020|archive-date=March 29, 2020|archive-url=https://web.archive.org/web/20200329054432/https://sonomacountyairport.org/passengers/parking/|url-status=live}}</ref>

A [[Sonoma–Marin Area Rail Transit]] (SMART) [[Sonoma County Airport station|Airport station]] was constructed about {{convert|1.5|mi}} from the airline passenger terminal on Airport Boulevard<ref>{{cite news|last1=Atkinson|first1=Rollie|title=County's airport is maxing out|url=http://www.sonomawest.com/sonoma_west_times_and_news/news/county-s-airport-is-maxing-out/article_0e7d1404-55fa-11e7-8acd-0b208632b42c.html|access-date=21 June 2017|work=Sonoma West Times & News|date=21 June 2017|archive-date=July 4, 2017|archive-url=https://web.archive.org/web/20170704165049/http://www.sonomawest.com/sonoma_west_times_and_news/news/county-s-airport-is-maxing-out/article_0e7d1404-55fa-11e7-8acd-0b208632b42c.html|url-status=dead}}</ref> and [[shuttle buses]] are currently serving as the link between the two locations.

The airport is served by [[Sonoma County Transit]] bus route 62.<ref>{{cite web|url=https://sctransit.com/maps-schedules/|title=Maps and Schedules|website=sctransit.com|access-date=March 29, 2020|archive-date=March 29, 2020|archive-url=https://web.archive.org/web/20200329054432/https://sctransit.com/maps-schedules/|url-status=live}}</ref> In addition, [[Mendocino Transit Authority]] routes 65 and 95 have limited pickups, and drop-offs by request.<ref>{{cite web|url=https://mendocinotransit.org/routes/route-65/|title=Mendocino Transit Authority Route 65|website=mendocinotransit.org|access-date=March 29, 2020|archive-date=March 29, 2020|archive-url=https://web.archive.org/web/20200329054431/https://mendocinotransit.org/routes/route-65/|url-status=live}}</ref><ref>{{cite web|url=https://mendocinotransit.org/routes/route-95/|title=Mendocino Transit Authority Route 95|website=mendocinotransit.org|access-date=March 29, 2020|archive-date=March 29, 2020|archive-url=https://web.archive.org/web/20200329054430/https://mendocinotransit.org/routes/route-95/|url-status=live}}</ref> Groome Transportation buses also connect the airport with the [[Oakland International Airport]] and [[San Francisco International Airport]].<ref>{{cite web|url=http://airportexpressinc.com/|title=Sonoma County Airport Express Inc.|website=Sonoma County Airport Express|access-date=December 14, 2017|archive-date=August 17, 2018|archive-url=https://web.archive.org/web/20180817111759/http://airportexpressinc.com/|url-status=dead}}</ref>

==Airlines and destinations==

===Passenger===
{{Airport destination list
| [[Alaska Airlines]]<ref>{{cite web | url=https://www.alaskaair.com/route-map/ | title=Route maps | access-date=April 7, 2022 | archive-date=April 8, 2022 | archive-url=https://web.archive.org/web/20220408052623/https://www.alaskaair.com/route-map/ | url-status=live }}</ref> | [[Hollywood Burbank Airport|Burbank]],  [[Harry Reid International Airport|Las Vegas]],<ref>{{cite web | url=https://sonomacounty.ca.gov/alaska-airlines-adds-direct-flights-from-charles-m-schulz-sonoma-county-airport-to-las-vegas | title=Alaska Airlines adds direct flights from Charles M. Schulz-Sonoma County Airport to Las Vegas }}</ref> [[Los Angeles International Airport|Los Angeles]], [[John Wayne Airport|Orange County]], [[Portland International Airport|Portland (OR)]], [[San Diego International Airport|San Diego]], [[Seattle–Tacoma International Airport|Seattle/Tacoma]]
| {{nowrap|[[American Airlines]]<ref>{{cite web | url=https://www.northbaybusinessjournal.com/article/industrynews/american-airlines-makes-conflicting-moves-at-charles-m-schulz-sonoma-count/ | title=American Airlines makes conflicting moves at Charles M. Schulz-Sonoma County Airport | access-date=November 17, 2023 }}</ref>}} | '''Seasonal:''' [[Dallas/Fort Worth International Airport|Dallas/Fort Worth]]
| {{nowrap|[[American Eagle (airline brand)|American Eagle]]<ref>{{cite web | url=https://www.aa.com/travelInformation/flights/schedule | title=Flight schedules and notifications - View schedules and set up notifications - American Airlines | access-date=November 15, 2022 | archive-date=February 2, 2017 | archive-url=https://web.archive.org/web/20170202010611/https://www.aa.com/travelInformation/flights/schedule | url-status=live }}</ref>}} | [[Phoenix Sky Harbor International Airport|Phoenix–Sky Harbor]]
| [[Avelo Airlines]] | [[Boise Airport|Boise]],<ref name=AVELO>{{cite web | url=https://www.northbaybusinessjournal.com/article/industrynews/avelo-adds-new-flights-from-sonoma-county-to-montana-idaho-oregon-washin/ | archive-date=April 22, 2024 | archive-url=https://archive.today/20240422042606/https://www.northbaybusinessjournal.com/article/industrynews/avelo-adds-new-flights-from-sonoma-county-to-montana-idaho-oregon-washin/ | title=Avelo adds 4 new flights out of Sonoma County | date=February 21, 2024 }}</ref> [[Hollywood Burbank Airport|Burbank]], [[McCarran International Airport|Las Vegas]], [[Ontario International Airport|Ontario (CA)]],<ref name=XPSLCONT>{{cite web | url= https://www.northbaybusinessjournal.com/article/industrynews/avelo-salt-lake-ontario-new-routes/| title= Avelo to launch flights from Sonoma County to Salt Lake City, plus another California market | date=July 31, 2024 }}</ref> [[Palm Springs International Airport|Palm Springs]], [[Salt Lake City International Airport|Salt Lake City]]<ref name=XPSLCONT /> <br />'''Seasonal:''' [[Glacier Park International Airport|Glacier Park/Kalispell]],<ref name=SLEFCA>{{cite web | url= https://www.pressdemocrat.com/article/industrynews/avelo-salem-kalispell-montana-oregon/?utm_campaign=trueAnthem%3A+Trending+Content&utm_medium=trueAnthem&utm_source=facebook&fbclid=IwZXh0bgNhZW0CMTEAAR0O5alFbq_-jLOA9i0rJcwtHWbW9jL_HsMmU6lMWARpvFjcO5olPBs1U9c_aem_DQmvsbjk5V_fgv_gvWlRsQ| title= Avelo Airlines to cancel Salem flight, move another to a seasonal schedule | date=July 31, 2024 }}</ref> [[Roberts Field|Redmond/Bend]]
}}
{| class="collapsible uncollapsed" style="border:1px #aaa solid; width:50em; margin:0.2em auto"
|-
! Destinations map
|-
|{{Location map+ |United_States |width=1000 |float=center
|caption=Destinations from Charles M. Schulz-Sonoma County Airport <br /> ({{font color | red | Red}}) = Year-round destination <br />({{font color | green | Green }}) = Seasonal destination <br /> ({{font color | blue | Blue }}) = Future destination <br />
|places=
{{Location map~ |United_States |lat=38.5092 |long=-122.8133|position=top |label=<div style="position:relative; top;"><small>'''Santa Rosa'''</small></div>|caption=|mark=Airplane_silhouette.svg|marksize=15 }}
{{Location map~ |United_States |lat=47.450165|long=-122.309176 |position=left|label='''<small>[[Seattle–Tacoma International Airport|Seattle/Tacoma]]</small>'''|label_size=90 |marksize=7 }}
{{Location map~ |mark = Red pog.svg |United_States |lat=43.5609|long=-116.2174 |position=right|label='''<small>[[Boise Airport|Boise]]</small>'''|label_size=90 |marksize=7 }}
{{Location map~ |mark = Green pog.svg |United_States |lat=48.3077|long=-114.2525 |position=right|label='''<small>[[Glacier Park International Airport|Glacier Park<br>/Kalispell]]</small>'''|label_size=90 |marksize=7 }}
{{Location map~ |United_States |lat=34.1983927|long=-118.3568153 |position=top|label='''<small>[[Hollywood Burbank Airport|Burbank]]</small>'''|label_size=90 |marksize=7 }}
{{Location map~ |United_States |lat=32.7338|long=-117.1933|position=left|label='''<small>[[San Diego International Airport|San Diego {{font|size=75%|{{nowrap|}}}}]]</small>'''|label_size=90 |marksize=7 }}
{{Location map~ |United States |lat=33.675556|long=-117.868333 |position=left|label=<small>'''{{nowrap|[[John Wayne Airport|Orange County]]}}'''</small>|label_size=90 |marksize=7 }}
{{Location map~ |United_States |lat=33.941381|long=-118.408619|position=left|label='''<small>[[Los Angeles International Airport|Los Angeles]]</small>'''|label_size=90 |marksize=7 }}
{{Location map~ |United States |lat=33.434167|long=-112.011667|position=right|label=<small>'''{{nowrap|[[Phoenix Sky Harbor International Airport|Phoenix<br>–Sky Harbor]]}}'''</small>|label_size=90 |marksize=7 }}
{{Location map~ |mark = Green pog.svg |United States|lat=32.896944|long=-97.038056|position=right|label=<small>'''{{nowrap|[[Dallas/Fort Worth International Airport|Dallas/Fort Worth]]}}'''</small>|label_size=90 |marksize=7 }}
{{Location map~ |United States |lat=45.5898|long=-122.5951|position=left|label='''<small>[[Portland International Airport|Portland]]</small>'''|label_size=90 |marksize=7 }}
{{Location map~ |United States |lat=36.0448 |long=-115.0908 |position=top|label='''<small>[[McCarran International Airport|Las Vegas]]</small>'''|label_size=90 |marksize=7 }}
{{Location map~ |mark = Red pog.svg |United States |lat=33.8303 |long=-116.5070 |position=right |label='''<small>[[Palm Springs International Airport|Palm Springs]]</small>'''|label_size=90 |marksize=7}}
{{Location map~ |United_States|  mark = Green pog.svg |lat=44.2542 |long=-121.1497 |position=bottom |label='''<small>[[Roberts Field|{{nowrap|Redmond/Bend}}]]</small>'''|label_size=90 |marksize=8}}
{{Location map~ |mark = Red pog.svg |United States |lat=40.7910 |long=-111.9768 |position=bottom |label='''<small>[[Salt Lake City International Airport|Salt Lake City]]</small>'''|label_size=90 |marksize=7}}
{{Location map~ |mark = Red pog.svg |United States |lat=34.0560 |long=-117.5981 |position=right |label='''<small>[[Ontario International Airport|Ontario]]</small>'''|label_size=90 |marksize=7}}
}}
|}

==Statistics==

{| class="wikitable sortable"
|+ '''Top routes from STS<br />(December 2022 – November 2023)'''<ref name=BTS>{{cite web|title=CA: CA: Charles M. Schulz - Sonoma County (STS)|url=http://www.transtats.bts.gov/airports.asp?pn=1&Airport=STS&Airport_Name=Santa_Rosa|work=[[Bureau of Transportation Statistics]]|access-date=February 27, 2024|archive-date=February 27, 2024|archive-url=https://web.archive.org/web/20240227194146/https://www.transtats.bts.gov/airports.asp?20=E&Nv42146=fgf&Nv42146_anzr=fn06n%20e15n,%20PN:%20Pun4yr5%20Z.%20fpu7yC%20-%20f101zn%20P1706B&pn44vr4=SNPgf|url-status=live}}</ref>
|-
! Rank 
! Airport 
! Passengers 
! Carriers
|-
| style="text-align:center;" | 1
| [[Seattle–Tacoma International Airport|Seattle/Tacoma, Washington]]
| style="text-align:center;" | 56,750
| Alaska
|-
| style="text-align:center;" | 2
| [[Hollywood Burbank Airport|Burbank, California]]
| style="text-align:center;" | 46,870
| Alaska, Avelo
|-
| style="text-align:center;" | 3
| [[Los Angeles International Airport|Los Angeles, California]]
| style="text-align:center;" | 38,970
| Alaska, American
|-
| style="text-align:center;" | 4
| [[San Diego International Airport|San Diego, California]]
| style="text-align:center;" | 38,280
| Alaska
|-
| style="text-align:center;" | 5
| [[John Wayne Airport|Orange County, California]]
| style="text-align:center;" | 33,740
| Alaska
|-
| style="text-align:center;" | 6
| [[Phoenix Sky Harbor International Airport|Phoenix, Arizona]]
| style="text-align:center;" | 30,780
| American
|-
| style="text-align:center;" | 7
| [[Portland International Airport|Portland, Oregon]]
| style="text-align:center;" | 21,710
| Alaska
|-
| style="text-align:center;" | 8
| [[Dallas/Fort Worth International Airport|Dallas/Fort Worth, Texas]]
| style="text-align:center;" | 20,160
| American
|-
| style="text-align:center;" | 9
| [[McCarran International Airport|Las Vegas, Nevada]]
| style="text-align:center;" | 16,970
| Avelo
|-
| style="text-align:center;"| 10
| [[Palm Springs International Airport|Palm Springs, California]]
| style="text-align:center;"| 7,220
| Avelo
|}
{| class="wikitable sortable" style="font-size: 95%"
|+ '''Largest airlines at STS<br />(December 2022 – November 2023)'''<ref name=BTS/>
|-
!Rank
!Airline
!Passengers
!Share
|-
| style="text-align:center;"|1
| [[SkyWest Airlines|SkyWest]]
| style="text-align:center;"|277,000
| style="text-align:center;"|43.83%
|-
| style="text-align:center;" |2
|[[Avelo Airlines|Avelo]]
| style="text-align:center;" |123,000
| style="text-align:center;" |19.48%
|-
| style="text-align:center;" |3
| [[Alaska Airlines|Alaska]]
| style="text-align:center;" |99,400
| style="text-align:center;" |15.73%
|-
| style="text-align:center;" |4
|[[Envoy Air|Envoy]]
| style="text-align:center;" |87,180
| style="text-align:center;" |13.80%
|-
| style="text-align:center;" |5
|[[Horizon Air|Horizon]]
| style="text-align:center;" |38,300
| style="text-align:center;" |6.06%
|}

==Other uses==

===Sonoma Air Attack Base===
The Sonoma Air Attack Base of the [[California Department of Forestry and Fire Protection]] (known as CDF or CAL FIRE) was established in 1964 at the northeast corner of the airport. Sonoma responds to an average of 300 calls per year. It has a battalion chief and a fire captain (air tactics group supervisors), a fire apparatus engineer (base manager) and six firefighters. Aircraft at Sonoma include one [[OV-10 Bronco]] (Air Attack 140) and two [[Grumman S-2 Tracker]] air tankers (classified as S-2Ts, Tankers 85 and 86.)

[[File:PcamSign.jpg|100px|thumb|PCAM]]
On average, the base pumps about {{convert|300000|USgal|m3|sigfig=1}} of retardant a year. With the base's pumps, four loading pits and equipment, Sonoma has a possible peak output of {{convert|120000|USgal|m3|sigfig=2}} of retardant each day. The base's immediate response area covers {{convert|4000|sqmi|km2|sigfig=2}} and includes Marin County and portions of the CDF Sonoma–Lake–Napa, Santa Clara, San Mateo–Santa Cruz, and Mendocino Units.

===Pacific Coast Air Museum===
The [[Pacific Coast Air Museum]] is at the southeast corner of the airport, next to the hangar used in the 1963 [[Cinema of the United States|Hollywood]] all-star comedy movie, ''[[It's a Mad, Mad, Mad, Mad World]]''. Known as the Butler Building, the hangar was built during World War II and is still in use.

==See also==
{{Portal|San Francisco Bay Area}}
* [[California World War II Army Airfields]]
* [[Wine tourism]]

==References==
{{reflist}}

==External links==
{{Commons category}}
* {{Official website|https://sonomacountyairport.org/}}
* [https://web.archive.org/web/20190113102250/http://www.henry1.com/ Sonoma County Sheriff Helicopter Unit]
* {{FAA-diagram|00696}}
* {{FAA-procedures|STS}}
{{US-airport-ga|STS}}

{{Air Force Historical Research Agency}}
{{Airports in the San Francisco Bay Area}}
{{USAAF 4th Air Force World War II}}

{{DEFAULTSORT:Charles M. Schulz-Sonoma County Airport}}
[[Category:1942 establishments in California]]
[[Category:Airports established in 1942]]
[[Category:Airfields of the United States Army Air Forces in California]]
[[Category:Airports in Sonoma County, California]]
[[Category:Charles M. Schulz]]
[[Category:History of Santa Rosa, California]]
[[Category:Transportation in Santa Rosa, California]]
[[Category:Buildings and structures in Santa Rosa, California]]