Cheap Flights From Logan Intl. (BOS) To Seattle - Tacoma Intl. (SEA)

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Cheapest Flights from Boston (BOS) to Seattle (SEA)

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were CA $328 round trip and CA $164 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Mar 18 - Tue, Mar 31
BOS
Boston
SEA
Seattle
CA $328 Roundtrip, found 5 days ago
CA $328
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Wed, Mar 18 from Boston to Seattle, returning Tue, Mar 31, priced at CA $328 found 5 days ago
Sat, Mar 21 - Sat, Mar 28
BOS
Boston
SEA
Seattle
CA $336 Roundtrip, found 1 day ago
CA $336
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Mar 21 from Boston to Seattle, returning Sat, Mar 28, priced at CA $336 found 1 day ago
Sat, Feb 28 - Sat, Mar 7
BOS
Boston
SEA
Seattle
CA $364 Roundtrip, found 6 days ago
CA $364
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, Feb 28 from Boston to Seattle, returning Sat, Mar 7, priced at CA $364 found 6 days ago
Wed, Aug 19 - Tue, Aug 25
BOS
Boston
SEA
Seattle
CA $369 Roundtrip, found 1 day ago
CA $369
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Aug 19 from Boston to Seattle, returning Tue, Aug 25, priced at CA $369 found 1 day ago
Wed, Mar 18 - Sun, Apr 5
BOS
Boston
SEA
Seattle
CA $376 Roundtrip, found 5 days ago
CA $376
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Wed, Mar 18 from Boston to Seattle, returning Sun, Apr 5, priced at CA $376 found 5 days ago
Wed, Aug 19 - Tue, Aug 25
BOS
Boston
SEA
Seattle
CA $382 Roundtrip, found 1 day ago
CA $382
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Aug 19 from Boston to Seattle, returning Tue, Aug 25, priced at CA $382 found 1 day ago
Sat, Mar 21 - Sat, Mar 28
BOS
Boston
SEA
Seattle
CA $385 Roundtrip, found 1 day ago
CA $385
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Mar 21 from Boston to Seattle, returning Sat, Mar 28, priced at CA $385 found 1 day ago
Tue, Feb 24 - Fri, Mar 6
BOS
Boston
SEA
Seattle
CA $386 Roundtrip, found 6 days ago
CA $386
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Feb 24 from Boston to Seattle, returning Fri, Mar 6, priced at CA $386 found 6 days ago
Wed, May 13 - Wed, May 20
BOS
Boston
SEA
Seattle
CA $390 Roundtrip, found 6 days ago
CA $390
Roundtrip
found 6 days ago
Select American Airlines flight, departing Wed, May 13 from Boston to Seattle, returning Wed, May 20, priced at CA $390 found 6 days ago
Sat, Feb 28 - Sat, Mar 7
BOS
Boston
SEA
Seattle
CA $393 Roundtrip, found 6 days ago
CA $393
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, Feb 28 from Boston to Seattle, returning Sat, Mar 7, priced at CA $393 found 6 days ago

Frequently asked questions

Are there direct flights from Logan Intl. Airport (BOS) to SEA?
Multiple airlines offer flights straight from Logan Intl. Airport to SEA. Among these are Delta and Alaska Airlines — check them out if you want to arrive at your destination as quickly as possible.
What airlines fly from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA)?
There are several airlines with direct flights from BOS to Sea-Tac Airport. Delta (DL) is one of the most well-known, operating approximately 86 flights each month. Another attractive option is Alaska Airlines (AS), which has 82 flights each month. The more airlines you take into account, the more likely you are to snap up a fantastic deal.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.

Popular Flight Routes from Boston (BOS)

Travelers at BOS love to visit these top cities. Roam to the top destinations from Boston (BOS) today with the cheap prices from Travelocity!

Popular Flight Routes from Seattle (SEA)

Travelers at SEA love to visit these top cities. Roam to the top destinations from Seattle(SEA) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.