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

View $129 flight on Wed, Sep 3, 2025Opens in a new window

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

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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 $243 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Oct 7 - Tue, Oct 14
STS
Santa Rosa
PSC
Pasco
$243 Roundtrip, found 6 days ago
$243
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Oct 7 from Santa Rosa to Pasco, returning Tue, Oct 14, priced at $243 found 6 days ago
Hawaiian Airlines
Wed, Sep 17 - Sat, Oct 4
STS
Santa Rosa
PSC
Pasco
$258 Roundtrip, found 1 day ago
$258
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Wed, Sep 17 from Santa Rosa to Pasco, returning Sat, Oct 4, priced at $258 found 1 day ago
Alaska Airlines
Wed, Nov 12 - Tue, Dec 2
STS
Santa Rosa
PSC
Pasco
$260 Roundtrip, found 2 days ago
$260
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Nov 12 from Santa Rosa to Pasco, returning Tue, Dec 2, priced at $260 found 2 days ago
Hawaiian Airlines
Tue, Dec 2 - Tue, Dec 16
STS
Santa Rosa
PSC
Pasco
$262 Roundtrip, found 2 days ago
$262
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Tue, Dec 2 from Santa Rosa to Pasco, returning Tue, Dec 16, priced at $262 found 2 days ago
Hawaiian Airlines
Wed, Sep 17 - Fri, Oct 3
STS
Santa Rosa
PSC
Pasco
$270 Roundtrip, found 1 day ago
$270
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Wed, Sep 17 from Santa Rosa to Pasco, returning Fri, Oct 3, priced at $270 found 1 day ago
Alaska Airlines
Thu, Nov 13 - Tue, Dec 2
STS
Santa Rosa
PSC
Pasco
$272 Roundtrip, found 2 days ago
$272
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from Santa Rosa to Pasco, returning Tue, Dec 2, priced at $272 found 2 days ago
Hawaiian Airlines
Tue, Sep 16 - Thu, Oct 2
STS
Santa Rosa
PSC
Pasco
$280 Roundtrip, found 2 days ago
$280
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Tue, Sep 16 from Santa Rosa to Pasco, returning Thu, Oct 2, priced at $280 found 2 days ago
Hawaiian Airlines
Wed, Sep 17 - Sun, Oct 5
STS
Santa Rosa
PSC
Pasco
$281 Roundtrip, found 1 day ago
$281
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Wed, Sep 17 from Santa Rosa to Pasco, returning Sun, Oct 5, priced at $281 found 1 day ago
Hawaiian Airlines
Thu, Sep 18 - Fri, Oct 3
STS
Santa Rosa
PSC
Pasco
$282 Roundtrip, found 1 day ago
$282
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Thu, Sep 18 from Santa Rosa to Pasco, returning Fri, Oct 3, priced at $282 found 1 day ago
American Airlines
Fri, Sep 19 - Mon, Oct 6
STS
Santa Rosa
PSC
Pasco
$1,857 Roundtrip, found 10 hours ago
$1,857
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Fri, Sep 19 from Santa Rosa to Pasco, returning Mon, Oct 6, priced at $1,857 found 10 hours ago

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

September is typically the cheapest month to fly

From $262 - $671 per traveler.

Graph displaying average flight prices per month

Flights from Santa Rosa (STS) to Pasco (PSC)
Origin airport
Sonoma County
Destination airport
Tri-Cities
Airlines serving
Alaska Airlines, American Airlines, Hawaiian Airlines
Roundtrip price
$242
Distance
567 mi

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.

 

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 $243 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.

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*Available to One Key members.