£112 Cheap Flights from Santa Rosa (STS) to Seattle (SEA)

View £112 flight on Fri, 27 Jun 2025Opens in a new window

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

Prices were available within the past 7 days and start at £112 for one-way flights and £365 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, 5 May - Thu, 8 May
STS
Santa Rosa
SEA
Seattle
£365 Return, found 3 days ago
£365
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 5 May from Santa Rosa to Seattle, returning Thu, 8 May, priced at £365 found 3 days ago
Alaska Airlines
Mon, 5 May - Thu, 8 May
STS
Santa Rosa
SEA
Seattle
£366 Return, found 3 days ago
£366
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 5 May from Santa Rosa to Seattle, returning Thu, 8 May, priced at £366 found 3 days ago
Alaska Airlines
Mon, 5 May - Thu, 8 May
STS
Santa Rosa
SEA
Seattle
£372 Return, found 3 days ago
£372
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 5 May from Santa Rosa to Seattle, returning Thu, 8 May, priced at £372 found 3 days ago
Alaska Airlines
Mon, 5 May - Thu, 8 May
STS
Santa Rosa
SEA
Seattle
£374 Return, found 3 days ago
£374
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 5 May from Santa Rosa to Seattle, returning Thu, 8 May, priced at £374 found 3 days ago
Alaska Airlines
Mon, 5 May - Thu, 8 May
STS
Santa Rosa
SEA
Seattle
£381 Return, found 3 days ago
£381
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 5 May from Santa Rosa to Seattle, returning Thu, 8 May, priced at £381 found 3 days ago
Alaska Airlines
Mon, 5 May - Thu, 8 May
STS
Santa Rosa
SEA
Seattle
£390 Return, found 3 days ago
£390
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 5 May from Santa Rosa to Seattle, returning Thu, 8 May, priced at £390 found 3 days ago
Alaska Airlines
Mon, 5 May - Thu, 8 May
STS
Santa Rosa
SEA
Seattle
£397 Return, found 3 days ago
£397
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 5 May from Santa Rosa to Seattle, returning Thu, 8 May, priced at £397 found 3 days ago
Alaska Airlines
Mon, 5 May - Thu, 8 May
STS
Santa Rosa
SEA
Seattle
£410 Return, found 3 days ago
£410
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 5 May from Santa Rosa to Seattle, returning Thu, 8 May, priced at £410 found 3 days ago
Alaska Airlines
Mon, 5 May - Thu, 8 May
STS
Santa Rosa
SEA
Seattle
£416 Return, found 3 days ago
£416
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 5 May from Santa Rosa to Seattle, returning Thu, 8 May, priced at £416 found 3 days ago
Alaska Airlines
Mon, 5 May - Thu, 8 May
STS
Santa Rosa
SEA
Seattle
£418 Return, found 3 days ago
£418
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 5 May from Santa Rosa to Seattle, returning Thu, 8 May, priced at £418 found 3 days ago
Flight from Santa Rosa to Seattle route information
Origin airport
Sonoma County
Destination airport
Seattle - Tacoma Intl.
Return price
£365
Distance
988 km

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 £365 and range up to £418.  

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 May, 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.  

Frequently asked questions

How much is a flight from STS to Sea-Tac Airport?
The lowest price advertised for a round-trip flight between STS and Sea-Tac Airport is £365. But you better move fast. This price is taken from fares offered within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Sonoma County Airport (STS) to SEA?
The majority of flights can be cancelled online, but whether or not you are charged a fee differs between airlines. If you do need to cancel your break, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from Sonoma County Airport to Sea-Tac Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for Sonoma County Airport to Sea-Tac Airport flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from Sonoma County Airport to SEA?
Forget about a movie marathon on this flight — it’s just 1,000 kilometres from Windsor to SeaTac. Find your seat, enjoy the in-flight service and you’ll be touching down before long.
Which airlines fly direct from STS to Sea-Tac Airport?
Flying straight from Sonoma County Airport (STS) to Seattle - Tacoma Intl. Airport (SEA) is easy with Alaska Airlines (AS). This leading airline offers 43 flights each month.
Are Sonoma County Airport (STS) to SEA flight tickets cheaper when they're purchased at the last minute?
Booking your trip from Sonoma County Airport (STS) to SEA at the last minute could be your ticket to an awesome deal. However, you might miss out on a flight altogether! If you’d prefer not to take any chances, book well ahead of your departure date. In fact, Expedia has some of the best bargains up to a year in advance. If your preferred air carrier hasn’t released tickets yet, check back frequently as deals are updated all the time on Expedia.

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