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

£97 Cheap Flights from Bellingham (BLI) to Seattle (SEA)

View £97 flight on Wed, 23 Sept 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at £97 for one-way flights and £163 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, 10 Sept - Thu, 17 Sept
BLI
Bellingham
SEA
Seattle
£163 Return, found 3 days ago
£163
Return
found 3 days ago
Select Alaska Airlines flight, departing Thu, 10 Sept from Bellingham to Seattle, returning Thu, 17 Sept, priced at £163 found 3 days ago
Alaska Airlines
Wed, 16 Sept - Wed, 23 Sept
BLI
Bellingham
SEA
Seattle
£182 Return, found 3 days ago
£182
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 16 Sept from Bellingham to Seattle, returning Wed, 23 Sept, priced at £182 found 3 days ago
Alaska Airlines
Mon, 14 Sept - Mon, 21 Sept
BLI
Bellingham
SEA
Seattle
£189 Return, found 3 days ago
£189
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 14 Sept from Bellingham to Seattle, returning Mon, 21 Sept, priced at £189 found 3 days ago
Alaska Airlines
Wed, 16 Sept - Wed, 23 Sept
BLI
Bellingham
SEA
Seattle
£193 Return, found 3 days ago
£193
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 16 Sept from Bellingham to Seattle, returning Wed, 23 Sept, priced at £193 found 3 days ago
Alaska Airlines
Wed, 16 Sept - Wed, 23 Sept
BLI
Bellingham
SEA
Seattle
£197 Return, found 3 days ago
£197
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 16 Sept from Bellingham to Seattle, returning Wed, 23 Sept, priced at £197 found 3 days ago
Alaska Airlines
Thu, 27 Aug - Sun, 30 Aug
BLI
Bellingham
SEA
Seattle
£201 Return, found 4 days ago
£201
Return
found 4 days ago
Select Alaska Airlines flight, departing Thu, 27 Aug from Bellingham to Seattle, returning Sun, 30 Aug, priced at £201 found 4 days ago
Alaska Airlines
Wed, 16 Sept - Wed, 23 Sept
BLI
Bellingham
SEA
Seattle
£204 Return, found 3 days ago
£204
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 16 Sept from Bellingham to Seattle, returning Wed, 23 Sept, priced at £204 found 3 days ago
Alaska Airlines
Sun, 13 Sept - Sun, 20 Sept
BLI
Bellingham
SEA
Seattle
£208 Return, found 3 days ago
£208
Return
found 3 days ago
Select Alaska Airlines flight, departing Sun, 13 Sept from Bellingham to Seattle, returning Sun, 20 Sept, priced at £208 found 3 days ago
Alaska Airlines
Mon, 14 Sept - Mon, 21 Sept
BLI
Bellingham
SEA
Seattle
£212 Return, found 3 days ago
£212
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 14 Sept from Bellingham to Seattle, returning Mon, 21 Sept, priced at £212 found 3 days ago
Alaska Airlines
Mon, 14 Sept - Mon, 21 Sept
BLI
Bellingham
SEA
Seattle
£216 Return, found 3 days ago
£216
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 14 Sept from Bellingham to Seattle, returning Mon, 21 Sept, priced at £216 found 3 days ago

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

February is typically the cheapest month to fly

From £102 - £147 per traveller.

Frequently asked questions

How much does a flight from Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find one-way and return flights from BLI to SEA with Expedia. 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 our cheapest fares first, and use the Price Tracking tool to receive alerts when BLI to SEA ticket fares go up or down.
What is the cheapest month to fly from Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The cheapest months to fly from BLI 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 Bellingham, WA (BLI) to Seattle, WA (SEA)?
Enter BLI to SEA 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 Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Alaska Airlines is one of the cheapest airlines offering nonstop return flights from Bellingham Intl. (BLI) to Seattle - Tacoma Intl. (SEA), with tickets starting from around £102 for flights that can be booked for departure within the next year. Alaska Airlines also offers one of the cheapest connecting return flights on this route, with tickets starting from around £190. These prices are per adult for economy/coach class. 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.
How do I find cheap flights from Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), 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 Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from Bellingham, WA (BLI-Bellingham Intl.) 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 Bellingham, WA (BLI-Bellingham Intl.) 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 Bellingham, WA (BLI-Bellingham Intl.) 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 Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There is 1 nonstop flight per day from Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.). For even more choices, look at flights that include layovers, as there is approximately 1 total flight per day. Some common connection points include Portland Intl. (PDX).
What is the earliest flight from Bellingham, WA (BLI) to Seattle, WA (SEA)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from Bellingham, WA (BLI) to Seattle, WA (SEA). To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll typically find the most flights from Bellingham Intl. (BLI) to Seattle - Tacoma Intl. (SEA) on a Wednesday, with around 5 flights available. This gives you a good selection of options for your travel plans. Alaska Airlines is a major airline on this route. Flight schedules are consistent throughout the week, so you'll find similar options on other days too.
What are the most popular departure times for flights from Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) are in the early morning, from 3am to 6am. Alaska Airlines offers flights during this window. Many travellers prefer this time as it allows for an early start to their day in Seattle.
How long does it take to fly from Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Flying nonstop from BLI to SEA takes around 1 hour, with the route covering approximately 151 kilometers. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You can fly first class between BLI and SEA. First class cabins are available on Alaska Airlines.
How do I earn miles on a Bellingham, WA (BLI) to Seattle, WA (SEA) flight with Expedia?
It's easy to earn miles on a Bellingham, WA (BLI) to Seattle, WA (SEA) 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.
Is it cheaper to buy a plane ticket from Bellingham, WA (BLI) to Seattle, WA (SEA) at the last minute?
Typically, booking a last minute flight from Bellingham, WA (BLI) to Seattle, WA (SEA) 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) to Seattle, WA (SEA) flight and hotel package?
Securing a Bellingham, WA (BLI) to Seattle, WA (SEA) 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 Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Bellingham, WA (BLI-Bellingham Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) 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
Bellingham Intl.
Destination airport
Seattle - Tacoma Intl.
Return price
£163
Distance
150 km

Book with confidence

Compare flights from Bellingham to Seattle easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Bellingham to Seattle. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Seattle - Tacoma Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Bellingham Intl. to Seattle - Tacoma Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Bellingham Intl. (BLI) to Seattle - Tacoma Intl. (SEA)

The easiest way to view the best deals on flights from Bellingham to Seattle today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Bellingham Intl. to Seattle - Tacoma Intl. start at just £163 and range up to £216.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Bellingham and Seattle
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Bellingham to Seattle flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Bellingham Intl. to Seattle - Tacoma Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Bellingham to Seattle easily and book with confidence

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*Available to Expedia members.