£132 Cheap Flights from Santa Rosa (STS) to Seattle (SEA)

View £132 flight on Wed, 29 Jul 2026Opens in a new window

Flight 1

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

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

Prices were available within the past 7 days and start at £132 for one-way flights and £220 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, 29 Jul - Mon, 3 Aug
STS
Santa Rosa
SEA
Seattle
£220 Return, found 1 day ago
£220
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 29 Jul from Santa Rosa to Seattle, returning Mon, 3 Aug, priced at £220 found 1 day ago
Alaska Airlines
Wed, 29 Jul - Mon, 3 Aug
STS
Santa Rosa
SEA
Seattle
£271 Return, found 1 day ago
£271
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 29 Jul from Santa Rosa to Seattle, returning Mon, 3 Aug, priced at £271 found 1 day ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
STS
Santa Rosa
SEA
Seattle
£272 Return, found 4 days ago
£272
Return
found 4 days ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Santa Rosa to Seattle, returning Wed, 24 Jun, priced at £272 found 4 days ago
Alaska Airlines
Wed, 29 Jul - Wed, 5 Aug
STS
Santa Rosa
SEA
Seattle
£278 Return, found 1 day ago
£278
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 29 Jul from Santa Rosa to Seattle, returning Wed, 5 Aug, priced at £278 found 1 day ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
STS
Santa Rosa
SEA
Seattle
£279 Return, found 4 days ago
£279
Return
found 4 days ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Santa Rosa to Seattle, returning Wed, 24 Jun, priced at £279 found 4 days ago
Alaska Airlines
Wed, 29 Jul - Mon, 3 Aug
STS
Santa Rosa
SEA
Seattle
£286 Return, found 1 day ago
£286
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 29 Jul from Santa Rosa to Seattle, returning Mon, 3 Aug, priced at £286 found 1 day ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
STS
Santa Rosa
SEA
Seattle
£288 Return, found 4 days ago
£288
Return
found 4 days ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Santa Rosa to Seattle, returning Wed, 24 Jun, priced at £288 found 4 days ago
Alaska Airlines
Wed, 29 Jul - Mon, 3 Aug
STS
Santa Rosa
SEA
Seattle
£293 Return, found 1 day ago
£293
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 29 Jul from Santa Rosa to Seattle, returning Mon, 3 Aug, priced at £293 found 1 day ago
Alaska Airlines
Wed, 29 Jul - Mon, 3 Aug
STS
Santa Rosa
SEA
Seattle
£294 Return, found 1 day ago
£294
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 29 Jul from Santa Rosa to Seattle, returning Mon, 3 Aug, priced at £294 found 1 day ago
Alaska Airlines
Wed, 17 Jun - Wed, 24 Jun
STS
Santa Rosa
SEA
Seattle
£295 Return, found 4 days ago
£295
Return
found 4 days ago
Select Alaska Airlines flight, departing Wed, 17 Jun from Santa Rosa to Seattle, returning Wed, 24 Jun, priced at £295 found 4 days ago

Frequently asked questions

How do I find cheap flights from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will differ from traveller to traveller. If you like to fly early, AS offers early morning flights. If price is the most important factor, AS typically offers the lowest fares. AS offers the most daily flights from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are approximately 6 connecting flights per day from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.). Some common connection points include San Diego Intl. (SAN), Bob Hope (BUR), and Portland Intl. (PDX).
What is the earliest flight from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) typically departs at approximately 6:00 AM local time, operated by Alaska Airlines. This is a seasonal service active in January and December. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll typically find the most flights from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) on a Friday, with around 18 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Alaska Airlines, Southwest Airlines, and American Airlines. Flight options on Friday are notably more than other days of the week.
What are the most popular departure times for flights from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) are between 12pm and 3pm. This accounts for around 27% of total traffic. Many major carriers, including Alaska Airlines, offer flights during this window. This timing works well because it allows for a productive morning before your flight and an afternoon arrival at your destination.
How long does it take to fly from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A nonstop flight from STS to SEA typically takes around 2 hours, covering approximately 618 miles. Connecting flights on this route usually add 5 hours to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Select the "Business class" and "First class" filters when looking for STS to SEA flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle from Sonoma County (STS)?
From Sonoma County (STS), you can fly directly into Seattle - Tacoma Intl. (SEA) to reach Seattle. Some flights may connect through major hubs like San Diego Intl. (SAN), Los Angeles Intl. (LAX), Portland Intl. (PDX) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Sonoma County
Destination airport
Seattle - Tacoma Intl.
Return price
£219
Distance
988 km
Average flight time
2 hours 4 mins

Book with confidence

Compare flights from Santa Rosa to Seattle easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Santa Rosa to Seattle. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Seattle - Tacoma Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Sonoma County to Seattle - Tacoma Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Sonoma County (STS) to Seattle - Tacoma Intl. (SEA)

The easiest way to view the best deals on flights from Santa Rosa to Seattle today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Sonoma County to Seattle - Tacoma Intl. start at just £220 and range up to £295.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Santa Rosa and Seattle
  • booking your flight during July, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Santa Rosa to Seattle flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Sonoma County to Seattle - Tacoma Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Santa Rosa to Seattle easily and book with confidence

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*Available to Expedia members.