$88 Cheap Flights from Santa Rosa (STS) to Seattle (SEA)

View $88 flight on Tue, Aug 26, 2025Opens in a new window

Popular airlines from Santa Rosa, CA (STS-Sonoma County) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Santa Rosa to Seattle (STS-SEA)

Prices were available within the past 7 days and start at $88 for one-way flights and $157 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Sat, Dec 6 - Tue, Dec 9
STS
Santa Rosa
SEA
Seattle
$157 Roundtrip, found 5 hours ago
$157
Roundtrip
found 5 hours ago
Select Hawaiian Airlines flight, departing Sat, Dec 6 from Santa Rosa to Seattle, returning Tue, Dec 9, priced at $157 found 5 hours ago
Alaska Airlines
Wed, Aug 27 - Sun, Aug 31
STS
Santa Rosa
SEA
Seattle
$167 Roundtrip, just found
$167
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Aug 27 from Santa Rosa to Seattle, returning Sun, Aug 31, priced at $167 just found
Alaska Airlines
Mon, Aug 25 - Sun, Aug 31
STS
Santa Rosa
SEA
Seattle
$177 Roundtrip, just found
$177
Roundtrip
just found
Select Alaska Airlines flight, departing Mon, Aug 25 from Santa Rosa to Seattle, returning Sun, Aug 31, priced at $177 just found
Hawaiian Airlines
Sun, Sep 7 - Sun, Sep 21
STS
Santa Rosa
SEA
Seattle
$187 Roundtrip, found 5 hours ago
$187
Roundtrip
found 5 hours ago
Select Hawaiian Airlines flight, departing Sun, Sep 7 from Santa Rosa to Seattle, returning Sun, Sep 21, priced at $187 found 5 hours ago
Alaska Airlines
Sat, Aug 30 - Sat, Sep 6
STS
Santa Rosa
SEA
Seattle
$196 Roundtrip, just found
$196
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Aug 30 from Santa Rosa to Seattle, returning Sat, Sep 6, priced at $196 just found
Alaska Airlines
Fri, Sep 26 - Sun, Sep 28
STS
Santa Rosa
SEA
Seattle
$197 Roundtrip, just found
$197
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, Sep 26 from Santa Rosa to Seattle, returning Sun, Sep 28, priced at $197 just found
American Airlines
Tue, Aug 19 - Sat, Aug 30
STS
Santa Rosa
SEA
Seattle
$199 Roundtrip, found 5 days ago
$199
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Aug 19 from Santa Rosa to Seattle, returning Sat, Aug 30, priced at $199 found 5 days ago
Hawaiian Airlines
Tue, Dec 16 - Wed, Dec 24
STS
Santa Rosa
SEA
Seattle
$202 Roundtrip, just found
$202
Roundtrip
just found
Select Hawaiian Airlines flight, departing Tue, Dec 16 from Santa Rosa to Seattle, returning Wed, Dec 24, priced at $202 just found
Alaska Airlines
Wed, Aug 27 - Sun, Aug 31
STS
Santa Rosa
SEA
Seattle
$206 Roundtrip, just found
$206
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Aug 27 from Santa Rosa to Seattle, returning Sun, Aug 31, priced at $206 just found
Alaska Airlines
Sun, Sep 21 - Tue, Sep 23
STS
Santa Rosa
SEA
Seattle
$207 Roundtrip, found 2 hours ago
$207
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Sun, Sep 21 from Santa Rosa to Seattle, returning Tue, Sep 23, priced at $207 found 2 hours ago

Find the cheapest month to fly from Santa Rosa (STS) to Seattle (SEA)

February is typically the cheapest month to fly

From $147 - $352 per traveler.

Graph displaying average flight prices per month

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $277
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $277
Flights from Santa Rosa (STS) to Seattle (SEA)
Origin airport
Sonoma County
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Hawaiian Airlines
Roundtrip price
$156
Distance
617 mi
Average flight time
2 hours 2 mins

Santa Rosa to Seattle Flights

The cheapest times to fly from Santa Rosa to Seattle

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 Seattle are during the month of December. You can find some of the cheapest flights from Santa Rosa to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Santa Rosa to Seattle

Sunday is one of the best days to book for cheap flights from Santa Rosa to Seattle: 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 Seattle

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 Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $88 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 Seattle 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 Seattle 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 Seattle - Tacoma Intl. Airport (SEA) cost?
You can land cheap return fares from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA) starting from $154. Book your seat and start your adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Alaska Airlines flight leaving STS on August 16 2025 and touching down at SEA. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from STS to SEA?
The cheapest flights from STS to SEA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA)?
You can fly directly from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA) on an Alaska Airlines flight.
What is the cheapest airline that flies from STS to SEA?
With tickets starting at $89 for a one-way journey from STS to SEA, Alaska Airlines is currently the cheapest carrier operating this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from STS on August 19 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA)?
On average, just 1 nonstop flight departs daily from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA). Need more options? Use our filter tool to discover flights with layovers and squeeze another destination into your itinerary.
What are the most popular departure times for flights from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA)?
More passengers fly between STS and SEA at 10 AM than at any other time of day. Prefer a quieter experience? Travel outside of rush hours and it's possible you'll save on your ticket as well.
What day of the week has the most flights from STS to SEA?
Friday has the most flights from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA). Consider taking off on this day and you'll have the best chance of finding a departure that fits your plans.
What is the earliest flight from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA)?
Sonoma County Airport (STS)'s earliest flight to Seattle - Tacoma Intl. Airport (SEA) is at approximately 10:01AM UTC-8. With a total flight time of 2h 8m, you'll land at around 12:09PM UTC-8.
How long does it take to fly from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA)?
It takes roughly 2 hours and 8 minutes to cover the 620 mi from STS to SEA.
What is the best time to fly from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA)?
Book a flight from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA) that leaves before 3 PM to reduce the likelihood of delays. Later departures have a 22% higher chance of being canceled, on average.**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.
What airports do you fly into for Seattle from Sonoma County Airport (STS)?
Check out your flight options from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA). This is the only airport in Seattle you can touch down at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Holding off until just before your departure to book a ticket from STS to SEA generally means paying more. While you may come across some last-minute discounts, there's no guarantee. Be flexible with your itinerary for a better chance of scoring a bargain.
Is it cheaper to book a STS to SEA flight and hotel package?
Securing a STS to SEA flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Pick from our wide range of accommodations and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA)?
Typically, you can cancel or modify your STS to SEA flight. However, there may be additional fees, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like further information, visit our Customer Service portal.

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