$157 Cheap Flights from Bellingham (BLI) to Santa Rosa (STS)

View $157 flight on Sat, Oct 18, 2025Opens 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 $157 for one-way flights and $242 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, Oct 18 - Sat, Oct 25
BLI
Bellingham
STS
Santa Rosa
$242 Roundtrip, found 20 hours ago
$242
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Sat, Oct 18 from Bellingham to Santa Rosa, returning Sat, Oct 25, priced at $242 found 20 hours ago
Hawaiian Airlines
Sat, Oct 25 - Sat, Nov 1
BLI
Bellingham
STS
Santa Rosa
$262 Roundtrip, found 2 days ago
$262
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Sat, Oct 25 from Bellingham to Santa Rosa, returning Sat, Nov 1, priced at $262 found 2 days ago
Alaska Airlines
Sat, Feb 21 - Mon, Feb 23
BLI
Bellingham
STS
Santa Rosa
$273 Roundtrip, found 2 days ago
$273
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Feb 21 from Bellingham to Santa Rosa, returning Mon, Feb 23, priced at $273 found 2 days ago
Hawaiian Airlines
Sat, Oct 25 - Wed, Oct 29
BLI
Bellingham
STS
Santa Rosa
$282 Roundtrip, found 2 days ago
$282
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Sat, Oct 25 from Bellingham to Santa Rosa, returning Wed, Oct 29, priced at $282 found 2 days ago
Hawaiian Airlines
Sat, Nov 22 - Sun, Dec 7
BLI
Bellingham
STS
Santa Rosa
$293 Roundtrip, found 6 days ago
$293
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Sat, Nov 22 from Bellingham to Santa Rosa, returning Sun, Dec 7, priced at $293 found 6 days ago
Hawaiian Airlines
Sat, Oct 25 - Thu, Oct 30
BLI
Bellingham
STS
Santa Rosa
$298 Roundtrip, found 2 days ago
$298
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Sat, Oct 25 from Bellingham to Santa Rosa, returning Thu, Oct 30, priced at $298 found 2 days ago
Hawaiian Airlines
Fri, Oct 31 - Mon, Nov 3
BLI
Bellingham
STS
Santa Rosa
$309 Roundtrip, found 2 days ago
$309
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Fri, Oct 31 from Bellingham to Santa Rosa, returning Mon, Nov 3, priced at $309 found 2 days ago
Hawaiian Airlines
Thu, Nov 27 - Fri, Dec 5
BLI
Bellingham
STS
Santa Rosa
$313 Roundtrip, found 6 days ago
$313
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Thu, Nov 27 from Bellingham to Santa Rosa, returning Fri, Dec 5, priced at $313 found 6 days ago
Alaska Airlines
Sat, Oct 18 - Sat, Oct 25
BLI
Bellingham
STS
Santa Rosa
$321 Roundtrip, found 20 hours ago
$321
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Sat, Oct 18 from Bellingham to Santa Rosa, returning Sat, Oct 25, priced at $321 found 20 hours ago
American Airlines
Tue, Nov 25 - Sat, Nov 29
BLI
Bellingham
STS
Santa Rosa
$1,458 Roundtrip, found 6 days ago
$1,458
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Nov 25 from Bellingham to Santa Rosa, returning Sat, Nov 29, priced at $1,458 found 6 days ago

Frequently asked questions

How much does a flight from Bellingham Intl. Airport (BLI) to Sonoma County Airport (STS) cost?
Get a cheap one-way flight from $157 or cheap return flight from $242 from Bellingham Intl. Airport (BLI) to Sonoma County Airport (STS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Bellingham Intl. Airport (BLI) to Sonoma County Airport (STS)?
The cheapest month to fly from BLI to STS is October, when demand is low. Off-peak season is often when airlines offer better prices between these airports.
What is the cheapest airline that flies from Bellingham Intl. Airport (BLI) to Sonoma County Airport (STS)?
To find the cheapest airline flying from BLI to STS, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Bellingham Intl. Airport (BLI) to Sonoma County Airport (STS)?
Direct flights from Bellingham Intl. Airport (BLI) to Sonoma County Airport (STS) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BLI to STS?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Bellingham Intl. Airport (BLI) to Sonoma County Airport (STS)?
Book a flight from Bellingham Intl. Airport (BLI) to Sonoma County Airport (STS) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this hour 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 Santa Rosa from Bellingham Intl. Airport (BLI)?
If you're on a direct flight from Bellingham Intl. Airport (BLI) to Santa Rosa, Oakland Intl. Airport (OAK) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Bellingham Intl. Airport (BLI) to Sonoma County Airport (STS) last-minute?
Holding off until right before your break to book your flight from BLI to STS often results in higher prices. While you may find some last-minute deals, they aren't always guaranteed. Be flexible with your itinerary to boost your chances of snagging a bargain.
Is it cheaper to book a BLI to STS flight and hotel package?
Compared with arranging hotels and flights separately, booking a BLI to STS flight and hotel package with Expedia could result in significant savings. What's more, having everything in one place will take the stress out of planning your trip. Simply pick your flights and select from our wide range of hotels, then customize your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Bellingham Intl. Airport (BLI) to Sonoma County Airport (STS)?
If you booked your BLI to STS flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

Travel information

Travel information

Origin airport
Bellingham Intl.
Destination airport
Sonoma County
Airlines serving
Alaska Airlines
Roundtrip price
$242
Distance
710 mi

Book with confidence

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 2025. You can also book with separate airlines for your outbound and return journeys, from $157 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

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Explore a world of travel with Expedia

*Available to One Key members.