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

View AU$168 flight on Tue, 7 Oct. 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

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

October is typically the cheapest month to fly

From AU$183 - AU$491 per traveller.

Graph displaying average flight prices per month

0
Flight from Bellingham to Seattle route information
Origin airport
Bellingham Intl.
Destination airport
Seattle - Tacoma Intl.
Distance
150 km

Your quick guide to flights from Bellingham to Seattle

Pick up great flights from Bellingham to Seattle

With Expedia, you have your pick of flights a day with 8 airlines covering flights from Bellingham to Seattle. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Bellingham to Seattle that take around hours.

Find cheap flights from Bellingham to Seattle

From the great flight deals with prices currently ranging from to , you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Bellingham to Seattle around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Seattle is normally in .

Reasons to book your flight from Bellingham to Seattle with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Bellingham to Seattle across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Seattle right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from Bellingham Intl. Airport (BLI) to SEA?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price quoted for a round-trip journey from Bellingham International Airport to Seattle - Tacoma Intl. Airport (SEA) was . Great fares don't stick around for long, so book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from BLI to Sea-Tac Airport?
This varies between airlines, as each has its own terms and conditions. Head to the Customer Service Portal, where there are instructions on how to cancel your flight online.
How do I find cheap flights from Bellingham International Airport to SEA 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 Bellingham Intl. Airport (BLI) to SEA flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Bellingham International Airport to Seattle - Tacoma Intl. Airport (SEA)?
It's just 150 kilometres between Bellingham International Airport and Seattle - Tacoma Intl. Airport (SEA). It's quite possible that you'll spend more time travelling to and from the airport than you will actually flying!
Which airlines fly direct from Bellingham Intl. Airport (BLI) to SEA?
A favourite with many frequent flyers, Alaska Airlines (AS) offers 139 monthly flights from Bellingham International Airport to Sea-Tac Airport. Pick the one that fits with your travel schedule and book your seat today.
Are Bellingham International Airport to SEA flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from Bellingham International Airport to Sea-Tac Airport can be hit-or-miss. It is possible to score a bargain, but you could also miss out completely! If you'd rather play it safe and start your trip planning ahead of time, Expedia compares flight deals up to a year in advance. Just keep in mind that not all airlines advertise their prices that far in advance. Our suggestion? Check back often as updates are made regularly.

Explore a world of travel with Expedia

*Available to Expedia members.