$129 Cheap Flights from Santa Rosa (STS) to Pasco (PSC)

View $129 flight on Tue, Dec 2, 2025Opens in a new window

Popular airlines from Santa Rosa, CA (STS-Sonoma County) to Tri-Cities Airport (PSC)

Cheap Flights from Santa Rosa to Pasco (STS-PSC)

Prices were available within the past 7 days and start at $129 for one-way flights and $186 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, Oct 22 - Wed, Nov 5
STS
Santa Rosa
PSC
Pasco
$186 Roundtrip, found 6 days ago
$186
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Oct 22 from Santa Rosa to Pasco, returning Wed, Nov 5, priced at $186 found 6 days ago
Alaska Airlines
Wed, Oct 22 - Wed, Nov 5
STS
Santa Rosa
PSC
Pasco
$209 Roundtrip, found 6 days ago
$209
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Oct 22 from Santa Rosa to Pasco, returning Wed, Nov 5, priced at $209 found 6 days ago
Alaska Airlines
Wed, Oct 22 - Wed, Nov 5
STS
Santa Rosa
PSC
Pasco
$229 Roundtrip, found 6 days ago
$229
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Oct 22 from Santa Rosa to Pasco, returning Wed, Nov 5, priced at $229 found 6 days ago
Alaska Airlines
Wed, Oct 22 - Wed, Nov 5
STS
Santa Rosa
PSC
Pasco
$239 Roundtrip, found 6 days ago
$239
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Oct 22 from Santa Rosa to Pasco, returning Wed, Nov 5, priced at $239 found 6 days ago
Alaska Airlines
Wed, Oct 22 - Wed, Nov 5
STS
Santa Rosa
PSC
Pasco
$242 Roundtrip, found 6 days ago
$242
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Oct 22 from Santa Rosa to Pasco, returning Wed, Nov 5, priced at $242 found 6 days ago
Alaska Airlines
Wed, Oct 15 - Wed, Nov 5
STS
Santa Rosa
PSC
Pasco
$242 Roundtrip, found 6 days ago
$242
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Oct 15 from Santa Rosa to Pasco, returning Wed, Nov 5, priced at $242 found 6 days ago
Hawaiian Airlines
Wed, Nov 19 - Tue, Dec 2
STS
Santa Rosa
PSC
Pasco
$242 Roundtrip, found 18 hours ago
$242
Roundtrip
found 18 hours ago
Select Hawaiian Airlines flight, departing Wed, Nov 19 from Santa Rosa to Pasco, returning Tue, Dec 2, priced at $242 found 18 hours ago
Alaska Airlines
Wed, Oct 22 - Wed, Nov 5
STS
Santa Rosa
PSC
Pasco
$246 Roundtrip, found 6 days ago
$246
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Oct 22 from Santa Rosa to Pasco, returning Wed, Nov 5, priced at $246 found 6 days ago
Alaska Airlines
Wed, Oct 22 - Wed, Nov 5
STS
Santa Rosa
PSC
Pasco
$248 Roundtrip, found 6 days ago
$248
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Oct 22 from Santa Rosa to Pasco, returning Wed, Nov 5, priced at $248 found 6 days ago
American Airlines
Tue, Dec 9 - Mon, Dec 15
STS
Santa Rosa
PSC
Pasco
$529 Roundtrip, found 1 day ago
$529
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Dec 9 from Santa Rosa to Pasco, returning Mon, Dec 15, priced at $529 found 1 day ago

Find the cheapest month to fly from Santa Rosa (STS) to Pasco (PSC)

September is typically the cheapest month to fly

From $258 - $767 per traveler.

Frequently asked questions

How much does a flight from Sonoma County Airport (STS) to Tri-Cities Airport (PSC) cost?
Grab a cheap one-way flight from $129 or cheap return flight from $186 from Sonoma County Airport (STS) to Tri-Cities Airport (PSC) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Sonoma County Airport (STS) to Tri-Cities Airport (PSC)?
Flying in October can help you save, as it's the cheapest month for flights between STS and PSC. You'll typically find the lowest fares during the off-season.
How many flights per day from Sonoma County Airport (STS) to Tri-Cities Airport (PSC)?
There are no daily nonstop flights from Sonoma County Airport (STS) to Tri-Cities Airport (PSC). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time at all.
What day of the week has the most flights from STS to PSC?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change based on various factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sonoma County Airport (STS) to Tri-Cities Airport (PSC)?
To arrive at Tri-Cities Airport (PSC) on time, book a flight that takes off from Sonoma County Airport (STS) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Sonoma County Airport (STS) to Tri-Cities Airport (PSC) last-minute?
Last-minute bookings from STS to PSC are usually more expensive. To lock in the lowest rates, start searching for flights early. That said, if your travel plans are flexible, it's possible to find a cheap ticket just before your departure.
Is it cheaper to book a STS to PSC flight and hotel package?
You'll generally save money by securing a STS to PSC flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've selected your preferred accommodations and flights, consider other add-ons like car rentals, tours and activities.
Can I cancel or change the date of my flight from Sonoma County Airport (STS) to Tri-Cities Airport (PSC)?
In most instances, you're able to reschedule or cancel your STS to PSC flight. However, additional charges may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you need more information, head to our Customer Service portal.

Travel information

Travel information

Origin airport
Sonoma County
Destination airport
Tri-Cities
Airlines serving
Alaska Airlines, American Airlines
Roundtrip price
$186
Distance
567 mi

Book with confidence

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 October. 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 2025. You can also book with separate airlines for your outbound and return journeys, from $129 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. 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.

 

Santa Rosa to Pasco Flights

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*Available to One Key members.