An Alaska Airlines plane taking off with a snow-capped mountain in the background.

CA $138 Cheap Flights from Santa Rosa (STS) to Seattle (SEA)

View CA $138 flight on Tue, Sep 29, 2026Opens in a new window

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

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at CA $138 for one-way flights and CA $248 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Sep 12 - Mon, Sep 14
STS
Santa Rosa
SEA
Seattle
CA $248 Roundtrip, found 1 day ago
CA $248
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Sep 12 from Santa Rosa to Seattle, returning Mon, Sep 14, priced at CA $248 found 1 day ago
Alaska Airlines
Fri, Oct 30 - Mon, Nov 2
STS
Santa Rosa
SEA
Seattle
CA $361 Roundtrip, found 6 days ago
CA $361
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Oct 30 from Santa Rosa to Seattle, returning Mon, Nov 2, priced at CA $361 found 6 days ago
Alaska Airlines
Fri, Oct 30 - Mon, Nov 2
STS
Santa Rosa
SEA
Seattle
CA $374 Roundtrip, found 6 days ago
CA $374
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Oct 30 from Santa Rosa to Seattle, returning Mon, Nov 2, priced at CA $374 found 6 days ago
Alaska Airlines
Thu, Sep 17 - Sun, Sep 20
STS
Santa Rosa
SEA
Seattle
CA $381 Roundtrip, found 6 days ago
CA $381
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Sep 17 from Santa Rosa to Seattle, returning Sun, Sep 20, priced at CA $381 found 6 days ago
Alaska Airlines
Fri, Oct 30 - Mon, Nov 2
STS
Santa Rosa
SEA
Seattle
CA $387 Roundtrip, found 6 days ago
CA $387
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Oct 30 from Santa Rosa to Seattle, returning Mon, Nov 2, priced at CA $387 found 6 days ago
Alaska Airlines
Fri, Oct 30 - Mon, Nov 2
STS
Santa Rosa
SEA
Seattle
CA $388 Roundtrip, found 6 days ago
CA $388
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Oct 30 from Santa Rosa to Seattle, returning Mon, Nov 2, priced at CA $388 found 6 days ago
Alaska Airlines
Fri, Oct 30 - Mon, Nov 2
STS
Santa Rosa
SEA
Seattle
CA $395 Roundtrip, found 6 days ago
CA $395
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Oct 30 from Santa Rosa to Seattle, returning Mon, Nov 2, priced at CA $395 found 6 days ago
Alaska Airlines
Fri, Oct 30 - Mon, Nov 2
STS
Santa Rosa
SEA
Seattle
CA $408 Roundtrip, found 6 days ago
CA $408
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Oct 30 from Santa Rosa to Seattle, returning Mon, Nov 2, priced at CA $408 found 6 days ago
Delta
Fri, Oct 30 - Mon, Nov 2
STS
Santa Rosa
SEA
Seattle
CA $415 Roundtrip, found 6 days ago
CA $415
Roundtrip
found 6 days ago
Select Delta flight, departing Fri, Oct 30 from Santa Rosa to Seattle, returning Mon, Nov 2, priced at CA $415 found 6 days ago
Alaska Airlines
Thu, Sep 17 - Sun, Sep 20
STS
Santa Rosa
SEA
Seattle
CA $416 Roundtrip, found 6 days ago
CA $416
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Sep 17 from Santa Rosa to Seattle, returning Sun, Sep 20, priced at CA $416 found 6 days ago

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

September is typically the cheapest month to fly

From CA $219 - CA $388 per traveller.

Frequently asked questions

How much does a flight from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find cheap one-way flights from CA $138 and cheap return flights from CA $248 STS to SEA with Expedia. One-way flights typically cost between CA$237 and CA$464. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when STS to SEA ticket fares go up or down.
What is the cheapest month to fly from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The cheapest months to fly from STS to SEA are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Enter STS to SEA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Santa Rosa, CA (STS) to Seattle, WA (SEA)?
To find a cheap flight from Santa Rosa, CA (STS) to Seattle, WA (SEA), 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 traveler to traveler. If you like to fly early, Alaska Airlines offers early morning flights. If price is the most important factor, Alaska Airlines typically offers the lowest fares. Alaska Airlines offers the most daily flights from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.), which is great 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.)?
While there aren't any direct flights, you'll find approximately 5 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 around 6:00 AM. This service is operated by Alaska Airlines. This is a seasonal service, active in January and December. An early departure like this can help you make the most of 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) to Seattle, WA (SEA) on a Thursday, with around 19 flights available. This gives you a good selection for your travel plans. Major airlines on this route include Alaska Airlines, Southwest Airlines, and American Airlines. Flight schedules are fairly consistent throughout the week, so you'll have plenty of options no matter when you choose to fly.
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 Sonoma County (STS) to Seattle - Tacoma Intl. (SEA) are in the early afternoon, from 12pm to 3pm. Many major carriers, including Alaska Airlines, Southwest Airlines and American Airlines, offer flights during this window. Many travellers prefer this time as it allows for a relaxed morning before heading to the airport, and you'll arrive in Seattle with plenty of time to settle in.
How long does it take to fly from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
When flying from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.), you have a few options. A nonstop flight typically takes around 2 hours, covering a distance of approximately 995 kilometres. If you opt for a flight with one stop, your travel time will generally be longer, averaging about 7 hours. For flights with two or more stops, you can expect the journey to take around 13 hours and 48 minutes. Keep in mind that actual flight times can vary due to factors like routing, weather, and wind patterns.
Can you fly business or first class from Santa Rosa, CA (STS-Sonoma County) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You can fly business class or first class between STS and SEA. First class cabins are available on Alaska Airlines and American Airlines.
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, WA (SEA) from Santa Rosa, CA (STS)?
If you're planning to travel to Seattle from Sonoma County Airport (STS), you can fly directly into Seattle - Tacoma Intl. (SEA). Some flights may connect through major hubs like San Diego Intl. (SAN), Los Angeles Intl. (LAX), or 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) to Seattle, WA (SEA)?
If you booked your Santa Rosa, CA (STS) to Seattle, WA (SEA) 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

0
Origin airport
Sonoma County
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines
Roundtrip price
CA $248
Distance
988 km

Book with confidence

Windsor to Seattle Flights

The easy way to book your flights from Santa Rosa to Seattle 

With Expedia, it’s simple to find and book flights to Seattle from Santa Rosa whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Seattle - Tacoma Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Santa Rosa to Seattle today, tomorrow, or this week.  

 

Save dollars with cheap flights from Sonoma County, STS to Seattle - Tacoma Intl., SEA 

Sort your search results by price to find great deals on your flight from Santa Rosa to Seattle—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Seattle from Santa Rosa currently is just CA $248 rising to CA $416.  

Here are more money-saving tips: 

  • Fly in September when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Seattle  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Seattle from Santa Rosa 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Seattle with Expedia today.

Windsor to Seattle Flights

Explore a world of travel with Expedia

*Available to Expedia members.