$69 Cheap Flights from Bellingham (BLI) to Seattle (SEA)

View $69 flight on Tue, Sep 2, 2025Opens in a new window

Popular airlines from Bellingham, WA (BLI-Bellingham Intl.) to Seattle-Tacoma International Airport (SEA)

Cheap Flights from Bellingham to Seattle (BLI-SEA)

Prices were available within the past 7 days and start at $69 for one-way flights and $97 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, Sep 24 - Sat, Oct 11
BLI
Bellingham
SEA
Seattle
$97 Roundtrip, found 5 days ago
$97
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Wed, Sep 24 from Bellingham to Seattle, returning Sat, Oct 11, priced at $97 found 5 days ago
Hawaiian Airlines
Wed, Sep 24 - Sat, Sep 27
BLI
Bellingham
SEA
Seattle
$107 Roundtrip, found 5 days ago
$107
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Wed, Sep 24 from Bellingham to Seattle, returning Sat, Sep 27, priced at $107 found 5 days ago
Alaska Airlines
Sat, Sep 20 - Sat, Sep 27
BLI
Bellingham
SEA
Seattle
$117 Roundtrip, found 1 day ago
$117
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Sep 20 from Bellingham to Seattle, returning Sat, Sep 27, priced at $117 found 1 day ago
Alaska Airlines
Sat, Oct 25 - Sun, Oct 26
BLI
Bellingham
SEA
Seattle
$127 Roundtrip, found 10 hours ago
$127
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Sat, Oct 25 from Bellingham to Seattle, returning Sun, Oct 26, priced at $127 found 10 hours ago
Alaska Airlines
Fri, Sep 12 - Sun, Sep 14
BLI
Bellingham
SEA
Seattle
$137 Roundtrip, found 12 hours ago
$137
Roundtrip
found 12 hours ago
Select Alaska Airlines flight, departing Fri, Sep 12 from Bellingham to Seattle, returning Sun, Sep 14, priced at $137 found 12 hours ago
Hawaiian Airlines
Fri, Jul 18 - Sun, Jul 20
BLI
Bellingham
SEA
Seattle
$138 Roundtrip, found 4 days ago
$138
Roundtrip
found 4 days ago
Select Hawaiian Airlines flight, departing Fri, Jul 18 from Bellingham to Seattle, returning Sun, Jul 20, priced at $138 found 4 days ago
Hawaiian Airlines
Fri, Jul 18 - Sun, Aug 3
BLI
Bellingham
SEA
Seattle
$148 Roundtrip, found 4 days ago
$148
Roundtrip
found 4 days ago
Select Hawaiian Airlines flight, departing Fri, Jul 18 from Bellingham to Seattle, returning Sun, Aug 3, priced at $148 found 4 days ago
Alaska Airlines
Sun, Nov 23 - Sat, Dec 6
BLI
Bellingham
SEA
Seattle
$158 Roundtrip, found 4 days ago
$158
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sun, Nov 23 from Bellingham to Seattle, returning Sat, Dec 6, priced at $158 found 4 days ago
Hawaiian Airlines
Sun, Sep 21 - Tue, Sep 23
BLI
Bellingham
SEA
Seattle
$167 Roundtrip, found 2 days ago
$167
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Sun, Sep 21 from Bellingham to Seattle, returning Tue, Sep 23, priced at $167 found 2 days ago
American Airlines
Sat, Aug 2 - Mon, Aug 4
BLI
Bellingham
SEA
Seattle
$221 Roundtrip, found 6 days ago
$221
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sat, Aug 2 from Bellingham to Seattle, returning Mon, Aug 4, priced at $221 found 6 days ago

Find the cheapest month to fly from Bellingham (BLI) to Seattle (SEA)

October is typically the cheapest month to fly

From $117 - $298 per traveler.

Graph displaying average flight prices per month

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Flights from Bellingham (BLI) to Seattle (SEA)
Origin airport
Bellingham Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines
Roundtrip price
$97
Distance
94 mi

Bellingham to Seattle Flights

The cheapest times to fly from Bellingham to Seattle

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

 

The best time to book a flight from Bellingham to Seattle

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

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 Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $69 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 Seattle 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 Seattle 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.

 

Frequently asked questions

How much does a flight from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA) cost?
Pick up cheap return fares starting at $127 from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Alaska Airlines flight leaving BLI on July 18 2025 and touching down at SEA. The price was last updated on July 1 2025 and has not changed since.
What is the cheapest month to fly from BLI to SEA?
Snap up a cheap ticket by booking your nonstop flight from BLI to SEA in November. You can find a one-way Alaska Airlines flight for $79 leaving on November 15 2025. This price is based on the cheapest direct flight found on Expedia for this route in the next 330 days. The price was last updated on July 1 2025 and remains unchanged.
Which airlines fly direct from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA)?
Fly directly from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA) on an Alaska Airlines flight.
What is the cheapest airline that flies from BLI to SEA?
Right now, the cheapest airline operating one-way flights from BLI to SEA is Alaska Airlines. You can jet off on this route from $79. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from BLI on September 16 2025. Prices were last updated on July 1 2025 and have not changed since.
How many flights per day from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA)?
Each day on average, 3 nonstop flights operate from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA). Choose the departure date that best fits your schedule.
What are the most popular departure times for flights from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA)?
Flights between BLI and SEA are their busiest at 5 AM. If you want a quieter trip and potentially cheaper prices, look for a time when demand is lower.
What day of the week has the most flights from BLI to SEA?
Friday has the most flights from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA). Consider taking off on this day and you'll have a greater chance of finding a departure that fits your schedule.
What is the earliest flight from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA)?
The earliest flight taking off from Bellingham Intl. Airport (BLI) is at around 5:19AM UTC-8. Catch this flight and you'll touch down at Seattle - Tacoma Intl. Airport (SEA) at approximately 6:10AM UTC-8. The overall travel time is 51m.
How long does it take to fly from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA)?
The average flight time from BLI to SEA is 50 minutes, covering a total distance of 95 mi.
What airline has the least delays from BLI to SEA?
With 95% of journeys usually arriving on time, American Airlines has the best on-time performance for nonstop flights from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA). To keep track of your flight status and receive notifications if anything changes, use the Expedia App.
What is the best time to fly from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA)?
Book a flight from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA) that leaves before 3 PM to reduce the likelihood of delays and cancellations. 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 Seattle from Bellingham Intl. Airport (BLI)?
Compare your flight options from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA). This is the only Seattle airport you can fly into if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Holding off until just before your departure to book a ticket from BLI to SEA generally means paying more. While it's possible to find some last-minute discounts, they're not always guaranteed. Be flexible with your travel plans for a better chance of getting a bargain.
Is it cheaper to book a BLI to SEA flight and hotel package?
Booking a BLI to SEA flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Pick from our impressive range of stays and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Bellingham Intl. Airport (BLI) to Seattle - Tacoma Intl. Airport (SEA)?
If you booked your BLI to SEA flight within the last 24 hours, you may be able to modify or cancel 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 more details.

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*Available to One Key members.