Title: Flights to Pasco from Santa Rosa from $121 (STS to PSC) - Expedia.com ![blue bridge over Columbia river in Tri-cities Washington state](https://images.trvl-media.com/place/2878/9049bec3-53f1-48e4-9f2a-258938982d2f.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/2878/9049bec3-53f1-48e4-9f2a-258938982d2f.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # $121 Cheap Flights from Santa Rosa (STS) to Pasco (PSC) [View $121 flight on Tue, May 5, 2026](https://expedia.com/Flights-Search?trip=oneway&leg1=from:STS,to:PSC,departure:5/5/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:120.80&airProductToken=AQppCjMIwaYBEgQzMzY2GPKUASCLuAEoqJaMAzCSl4wDOFhAAFgBagVTQVZFUnIIT0gyT1hVQk4KMgjBpgESBDMzMDMYi7gBIM8UKJucjAMwuJ2MAzhYQAFYAWoFU0FWRVJyCE9IMk9YVUJOEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwDQ) ## Popular airlines from Santa Rosa, CA (STS-Sonoma County) to Tri-Cities Airport (PSC) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.com/Flights-Search?leg1=from:STS,to:PSC,departure:3/31/2026TANYT&leg2=from:PSC,to:STS,departure:4/7/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* - ![](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our OneKeyCash [Learn about One Key](https://www.expedia.com/welcome-one-key) ## Cheap Flights from Santa Rosa to Pasco (STS-PSC) Prices were available within the past 7 days and start at $121 for one-way flights and $254 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Sat, Apr 25 - Sat, May 2 STS Santa Rosa PSC Pasco $254 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STS,to:PSC,departure:4/25/2026TANYT&leg2=from:PSC,to:STS,departure:5/2/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:253.40&airProductToken=AQppCjMIwaYBEgQzMjcxGPKUASCBjQEouKaLAzCQp4sDOFhAAFgBagVTQVZFUnIIT0gyT1hVQk4KMgjBpgESBDMxMDEYgY0BIM8UKOupiwMwiauLAzhYQAFYAWoFU0FWRVJyCE9IMk9YVUJOCmcKMQjBpgESBDMzNTIYzxQgkgEo9_iLAzC8-YsDOFhAAFgBagVTQVZFUnIIT0gyWVhVQk4KMgjBpgESBDI0MzEYkgEg8pQBKI37iwMwhfyLAzhYQAFYAWoFU0FWRVJyCE9IMllYVUJOEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwDQ) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Sat, Apr 25 - Sat, May 2 STS Santa Rosa PSC Pasco $262 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STS,to:PSC,departure:4/25/2026TANYT&leg2=from:PSC,to:STS,departure:5/2/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:261.69&airProductToken=AQppCjMIwaYBEgQzMjcxGPKUASCBjQEouKaLAzCQp4sDOFhAAFgBagVTQVZFUnIIT0gyT1hVQk4KMgjBpgESBDMxMDEYgY0BIM8UKOupiwMwiauLAzhYQAFYAWoFU0FWRVJyCE9IMk9YVUJOCpwBCjEIwaYBEgQzMzUyGM8UIJIBKPf4iwMwvPmLAzhYQABYAWoFU0FWRVJyCEdIMllYVUJOCjIIwaYBEgQxNDE1GJIBIIGNASir-osDMMv7iwM4WEABWAFqBVNBVkVScghHSDJZWFVCTgozCMGmARIEMzI3MBiBjQEg8pQBKOj_iwMw2YCMAzhYQAFYAWoFU0FWRVJyCEdIMk9BVkJOEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwDQ) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Sat, Apr 25 - Mon, Apr 27 STS Santa Rosa PSC Pasco $264 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STS,to:PSC,departure:4/25/2026TANYT&leg2=from:PSC,to:STS,departure:4/27/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:263.40&airProductToken=AQppCjMIwaYBEgQzMjcxGPKUASCBjQEouKaLAzCQp4sDOFhAAFgBagVTQVZFUnIIT0gyT1hVQk4KMgjBpgESBDMxMDEYgY0BIM8UKOupiwMwiauLAzhYQAFYAWoFU0FWRVJyCE9IMk9YVUJOCmkKMgjBpgESBDMxMDIYzxQggY0BKPHBiwMwgcOLAzhYQABYAWoFU0FWRVJyCFFIMk9BVUJOCjMIwaYBEgQzMjcwGIGNASDylAEoyMeLAzC5yIsDOFhAAVgBagVTQVZFUnIIUUgyT0FVQk4SCggBEAEYASoCQVMYASIECAEQASgCKAMoBDAN) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Sat, Apr 25 - Sat, May 2 STS Santa Rosa PSC Pasco $282 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STS,to:PSC,departure:4/25/2026TANYT&leg2=from:PSC,to:STS,departure:5/2/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:281.40&airProductToken=AQppCjMIwaYBEgQzMjcxGPKUASCBjQEouKaLAzCQp4sDOFhAAFgBagVTQVZFUnIIT0gyT1hVQk4KMgjBpgESBDMxMDEYgY0BIM8UKOupiwMwiauLAzhYQAFYAWoFU0FWRVJyCE9IMk9YVUJOCmcKMQjBpgESBDIwMzAYzxQgkgEoxfeLAzCF-IsDOFhAAFgBagVTQVZFUnIIUUgyT1hVQk4KMgjBpgESBDI0MzEYkgEg8pQBKI37iwMwhfyLAzhYQAFYAWoFU0FWRVJyCFFIMk9YVUJOEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwDQ) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Sat, Apr 25 - Mon, Apr 27 STS Santa Rosa PSC Pasco $292 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STS,to:PSC,departure:4/25/2026TANYT&leg2=from:PSC,to:STS,departure:4/27/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:291.40&airProductToken=AQppCjMIwaYBEgQzMjcxGPKUASCBjQEouKaLAzCQp4sDOFhAAFgBagVTQVZFUnIIT0gyT1hVQk4KMgjBpgESBDMxMDEYgY0BIM8UKOupiwMwiauLAzhYQAFYAWoFU0FWRVJyCE9IMk9YVUJOCmcKMQjBpgESBDIwMzAYzxQgkgEopb-LAzDlv4sDOFhAAFgBagVTQVZFUnIIUUgyT0FVQk4KMgjBpgESBDI0MzEYkgEg8pQBKO3CiwMw5cOLAzhYQAFYAWoFU0FWRVJyCFFIMk9BVUJOEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwDQ) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Sat, Apr 25 - Mon, Apr 27 STS Santa Rosa PSC Pasco $292 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STS,to:PSC,departure:4/25/2026TANYT&leg2=from:PSC,to:STS,departure:4/27/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:291.69&airProductToken=AQppCjMIwaYBEgQzMjcxGPKUASCBjQEouKaLAzCQp4sDOFhAAFgBagVTQVZFUnIIT0gyT1hVQk4KMgjBpgESBDMxMDEYgY0BIM8UKOupiwMwiauLAzhYQAFYAWoFU0FWRVJyCE9IMk9YVUJOCpwBCjEIwaYBEgQzMzUyGM8UIJIBKNfAiwMwnMGLAzhYQABYAWoFU0FWRVJyCE9IMllBVUJOCjIIwaYBEgQxNDE1GJIBIIGNASiLwosDMKvDiwM4WEABWAFqBVNBVkVScghPSDJZQVVCTgozCMGmARIEMzI3MBiBjQEg8pQBKMjHiwMwuciLAzhYQAFYAWoFU0FWRVJyCE9IMk9YVUJOEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwDQ) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Mon, Apr 20 - Thu, Apr 23 STS Santa Rosa PSC Pasco $297 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STS,to:PSC,departure:4/20/2026TANYT&leg2=from:PSC,to:STS,departure:4/23/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:296.40&airProductToken=AQppCjMIwaYBEgQzMjcxGPKUASCBjQEop--KAzD-74oDOFhAAFgBagVTQVZFUnIIUUgyT0FVQk4KMgjBpgESBDMxMDEYgY0BIM8UKPDxigMwjfOKAzhYQAFYAWoFU0FWRVJyCFFIMk9BVUJOCmkKMgjBpgESBDMxMDIYzxQggY0BKPGUiwMwgZaLAzhYQABYAWoFU0FWRVJyCFFIMk9BVUJOCjMIwaYBEgQzMjcwGIGNASDylAEoyJqLAzC5m4sDOFhAAVgBagVTQVZFUnIIUUgyT0FVQk4SCggBEAEYASoCQVMYASIECAEQASgCKAMoBDAN) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Sat, Apr 25 - Sat, May 2 STS Santa Rosa PSC Pasco $305 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STS,to:PSC,departure:4/25/2026TANYT&leg2=from:PSC,to:STS,departure:5/2/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:304.40&airProductToken=AQpnCjIIwaYBEgQxMzIyGPKUASCSASjdqIsDMN2piwM4WEAAWAFqBVNBVkVScghRSDJPWFVCTgoxCMGmARIEMjM2NxiSASDPFCj1qosDMLGriwM4WEABWAFqBVNBVkVScghRSDJPWFVCTgpnCjEIwaYBEgQzMzUyGM8UIJIBKPf4iwMwvPmLAzhYQABYAWoFU0FWRVJyCE9IMllYVUJOCjIIwaYBEgQyNDMxGJIBIPKUASiN-4sDMIX8iwM4WEABWAFqBVNBVkVScghPSDJZWFVCThIKCAEQARgBKgJBUxgBIgQIARABKAIoAygEMA0) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Sat, Apr 25 - Sat, May 2 STS Santa Rosa PSC Pasco $312 Roundtrip found 1 day ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STS,to:PSC,departure:4/25/2026TANYT&leg2=from:PSC,to:STS,departure:5/2/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:311.70&airProductToken=AQppCjMIwaYBEgQzMjcxGPKUASCBjQEouKaLAzCQp4sDOFhAAFgBagVTQVZFUnIIT0gyT1hVQk4KMgjBpgESBDMxMDEYgY0BIM8UKOupiwMwiauLAzhYQAFYAWoFU0FWRVJyCE9IMk9YVUJOCpwBCjEIwaYBEgQyMDMwGM8UIJIBKMX3iwMwhfiLAzhYQABYAWoFU0FWRVJyCFFIMk9YVUJOCjIIwaYBEgQxNDExGJIBIIu4ASim-YsDMNP6iwM4WEABWAFqBVNBVkVScghPSDJZWFVCTgozCMGmARIEMzM0OBiLuAEg8pQBKJ_7iwMwifyLAzhYQAFYAWoFU0FWRVJyCE9IMllYVUJOEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwDQ) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Fri, Jun 5 - Sat, Jun 6 STS Santa Rosa PSC Pasco $599 Roundtrip found 5 days ago [](https://expedia.com/Flights-Search?trip=roundtrip&leg1=from:STS,to:PSC,departure:6/5/2026TANYT&leg2=from:PSC,to:STS,departure:6/6/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:598.40&airProductToken=AQpnCjIIwYIBEgQ2NDU5GPKUASDvuQEouPeOAzC6-I4DOE5AAFgBagRNQUlOcghOV0ZXWk5OMQoxCMGCARIENjI5MhjvuQEgzxQotvmOAzDh-o4DOE5AAVgBagRNQUlOcghOV0ZXWk5OMQpnCjEIwYIBEgQ2MzYwGM8UIO-5ASi__Y4DMOb-jgM4TkAAWAFqBE1BSU5yCE5XRldaTk4xCjIIwYIBEgQ2MzYxGO-5ASDylAEo4P-OAzDygI8DOE5AAVgBagRNQUlOcghOV0ZXWk5OMRIKCAEQARgBKgJBQRgBIgQIARABKAIoAygEMAs) ## Alternative airports near Pasco Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.com/Flights-Search?leg1=from:STS,to:PSC,departure:3/31/2026TANYT&leg2=from:PSC,to:STS,departure:4/4/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) PSC Tri-Cities CheapestClosest 4 min [Flights from $633 ](https://www.expedia.com/Flights-Search?leg1=from:STS,to:PSC,departure:3/31/2026TANYT&leg2=from:PSC,to:STS,departure:4/4/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Find the cheapest month to fly from Santa Rosa (STS) to Pasco (PSC) ### October is typically the cheapest month to fly From $240 - $667 per traveler. ## Frequently asked questions ### How much does a flight from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities) cost? ### What is the cheapest month to fly from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities)? ### Which airlines fly direct from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities)? ### What is the cheapest airline that flies from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities)? ### How do I find cheap flights from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities)? ### What is the best time to fly from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities)? ### What is the earliest flight from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities)? ### What are the most popular departure times for flights from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities)? ### How long does it take to fly from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities)? ### Can you fly business or first class from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities)? ### How do I earn miles on a Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities) flight with Expedia? ### What airports do you fly into for Pasco from Sonoma County (STS)? ### Is it cheaper to buy a plane ticket from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities) at the last minute? ### Is it cheaper to book a Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities) flight and hotel package? ### Can I cancel or change the date of my flight from Santa Rosa, CA (STS-Sonoma County) to Pasco, WA (PSC-Tri-Cities)? ## Travel information | Origin airport | Sonoma County | | ------------------- | --------------- | | Destination airport | Tri-Cities | | Airlines serving | Alaska Airlines | | Roundtrip price | $253 | | Distance | 567 mi | ## Book with confidence # Santa Rosa to Pasco Flights The cheapest times to fly from Santa Rosa to Pasco On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Santa Rosa to Pasco are during the month of April. You can find some of the cheapest flights from Santa Rosa to Pasco with Expedia's search tool and vast selection of airlines. The best time to book a flight from Santa Rosa to Pasco Sunday is one of the best days to book for cheap flights from Santa Rosa to Pasco: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance. How to find cheap round-trip tickets from Santa Rosa to Pasco Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Santa Rosa to Pasco in 2026\. You can also book with separate airlines for your outbound and return journeys, from $121 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference\*. This is available for a small fee, and is free to One Key Gold and Platinum tier members. Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Santa Rosa to Pasco flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps. You could also save big by booking one of Expedia's [vacation packages](https://www.expedia.com/package-deals). Bundling together your Santa Rosa to Pasco airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures. \*Terms apply. Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023\. The percentages you see are averages. \*Flight schedules are subject to change. ## Explore a world of travel with Expedia - Lodging - Flights - [Pasco Hotels ](https://www.expedia.com/Pasco-Hotels.d2878.Travel-Guide-Hotels) - [Flights to Pasco ](https://www.expedia.com/Cheap-Flights-To-Pasco.d2878.Travel-Guide-Flights) - [Phoenix to Pasco ](https://www.expedia.com/lp/flights/178298/2878/phoenix-to-pasco) - [Dallas to Pasco ](https://www.expedia.com/lp/flights/178253/2878/dallas-to-pasco) \*Available to One Key members.