A vineyard with rows of grapevines, a dirt path, and a backdrop of rolling hills and trees.

$191 Cheap Flights from Bellingham (BLI) to Santa Rosa (STS)

View $191 flight on Wed, Nov 18, 2026Opens in a new window

Popular airlines from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County)

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Cheap Flights from Bellingham to Santa Rosa (BLI-STS)

Prices were available within the past 7 days and start at $191 for one-way flights and $406 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, Oct 24 - Mon, Oct 26
BLI
Bellingham
STS
Santa Rosa
$406 Roundtrip, found 1 day ago
$406
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 24 from Bellingham to Santa Rosa, returning Mon, Oct 26, priced at $406 found 1 day ago
Alaska Airlines
Sat, Oct 24 - Mon, Oct 26
BLI
Bellingham
STS
Santa Rosa
$439 Roundtrip, found 1 day ago
$439
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 24 from Bellingham to Santa Rosa, returning Mon, Oct 26, priced at $439 found 1 day ago
Alaska Airlines
Sat, Oct 24 - Mon, Oct 26
BLI
Bellingham
STS
Santa Rosa
$440 Roundtrip, found 1 day ago
$440
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 24 from Bellingham to Santa Rosa, returning Mon, Oct 26, priced at $440 found 1 day ago
Alaska Airlines
Sat, Oct 24 - Mon, Oct 26
BLI
Bellingham
STS
Santa Rosa
$443 Roundtrip, found 1 day ago
$443
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 24 from Bellingham to Santa Rosa, returning Mon, Oct 26, priced at $443 found 1 day ago
Alaska Airlines
Thu, Nov 19 - Tue, Dec 1
BLI
Bellingham
STS
Santa Rosa
$446 Roundtrip, found 1 day ago
$446
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Nov 19 from Bellingham to Santa Rosa, returning Tue, Dec 1, priced at $446 found 1 day ago
Alaska Airlines
Sat, Oct 24 - Mon, Oct 26
BLI
Bellingham
STS
Santa Rosa
$450 Roundtrip, found 1 day ago
$450
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 24 from Bellingham to Santa Rosa, returning Mon, Oct 26, priced at $450 found 1 day ago
Alaska Airlines
Thu, Oct 29 - Sun, Nov 1
BLI
Bellingham
STS
Santa Rosa
$465 Roundtrip, found 2 days ago
$465
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Oct 29 from Bellingham to Santa Rosa, returning Sun, Nov 1, priced at $465 found 2 days ago
Alaska Airlines
Thu, Nov 19 - Tue, Dec 1
BLI
Bellingham
STS
Santa Rosa
$467 Roundtrip, found 1 day ago
$467
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Nov 19 from Bellingham to Santa Rosa, returning Tue, Dec 1, priced at $467 found 1 day ago
Alaska Airlines
Sat, Oct 24 - Mon, Oct 26
BLI
Bellingham
STS
Santa Rosa
$470 Roundtrip, found 1 day ago
$470
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 24 from Bellingham to Santa Rosa, returning Mon, Oct 26, priced at $470 found 1 day ago
American Airlines
Thu, Sep 17 - Mon, Sep 21
BLI
Bellingham
STS
Santa Rosa
$3,040 Roundtrip, found 1 day ago
$3,040
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Sep 17 from Bellingham to Santa Rosa, returning Mon, Sep 21, priced at $3,040 found 1 day ago

Frequently asked questions

How much does a flight from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County) cost?
You can find cheap one-way flights from $191 and cheap return flights from $406 Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County) with Expedia. One-way flights usually range from $457 to $981, and return flights typically cost between $483 and $1398. 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 Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The cheapest month to fly from BLI to STS is October 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're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County)?
Enter BLI to STS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County)?
Alaska Airlines is one of the cheapest airlines offering connecting flights from Bellingham Intl. (BLI) to Sonoma County (STS), with round-trip tickets starting from around $373 with a layover in Seattle - Tacoma Intl. (SEA). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County)?
To find a cheap flight from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County), 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 time to fly from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County)?
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.
What is the earliest flight from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County)?
The earliest flight from Bellingham International Airport (BLI) to Sonoma County Airport (STS) usually departs at around 5:15 AM, operated by Alaska Airlines. This is a seasonal service active in October, and an early start can help you maximize your time in California's wine country. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County)?
For flights from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County), the most popular departure times are in the early morning, from 3am to 6am. About 31% of passengers prefer this time window. Many major carriers, including Alaska Airlines, offer flights during this window. This timing works well because it allows you to start your day early and make the most of your time in Santa Rosa.
Can you fly business or first class from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County)?
Select the "Business class" and "First class" filters when looking for BLI to STS 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 Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County) flight with Expedia?
It's easy to earn miles on a Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County) 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 Santa Rosa from Bellingham Intl. (BLI)?
From Bellingham Intl. (BLI), you can fly into Sonoma County (STS) to reach Santa Rosa. Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA) before reaching Santa Rosa. 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 Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County) at the last minute?
Typically, booking a last minute flight from Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County) 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 Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County) flight and hotel package?
Securing a Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County) 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 Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County)?
If you booked your Bellingham, WA (BLI-Bellingham Intl.) to Santa Rosa, CA (STS-Sonoma County) 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
Bellingham Intl.
Destination airport
Sonoma County
Airlines serving
Alaska Airlines
Roundtrip price
$405
Distance
710 mi

Book with confidence

Bellingham to Santa Rosa Flights

The cheapest times to fly from Bellingham to Santa Rosa

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

 

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

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

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 Bellingham to Santa Rosa in 2026. You can also book with separate airlines for your outbound and return journeys, from $191 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 Bellingham to Santa Rosa 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 Bellingham to Santa Rosa 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.

 

Bellingham to Santa Rosa Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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