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 $167 one way. Prices and availability subject to change. Additional terms may apply.

Thu, Nov 20 - Sun, Nov 23
BOS
Boston
SEA
Seattle
CA $328 Roundtrip, found 5 days ago
CA $328
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Nov 20 from Boston to Seattle, returning Sun, Nov 23, priced at CA $328 found 5 days ago
Wed, Nov 5 - Sun, Nov 23
BOS
Boston
SEA
Seattle
CA $333 Roundtrip, found 5 days ago
CA $333
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Wed, Nov 5 from Boston to Seattle, returning Sun, Nov 23, priced at CA $333 found 5 days ago
Thu, Nov 13 - Mon, Nov 17
BOS
Boston
SEA
Seattle
CA $338 Roundtrip, found 2 days ago
CA $338
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Nov 13 from Boston to Seattle, returning Mon, Nov 17, priced at CA $338 found 2 days ago
Tue, Jan 13 - Tue, Jan 13
BOS
Boston
SEA
Seattle
CA $345 Roundtrip, found 4 days ago
CA $345
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Tue, Jan 13 from Boston to Seattle, returning Tue, Jan 13, priced at CA $345 found 4 days ago
Sat, Jan 31 - Fri, Feb 6
BOS
Boston
SEA
Seattle
CA $347 Roundtrip, found 7 hours ago
CA $347
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Sat, Jan 31 from Boston to Seattle, returning Fri, Feb 6, priced at CA $347 found 7 hours ago
Tue, Nov 11 - Sat, Nov 15
BOS
Boston
SEA
Seattle
CA $352 Roundtrip, found 3 days ago
CA $352
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Nov 11 from Boston to Seattle, returning Sat, Nov 15, priced at CA $352 found 3 days ago
Thu, Nov 20 - Sun, Nov 23
BOS
Boston
SEA
Seattle
CA $375 Roundtrip, found 5 days ago
CA $375
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Nov 20 from Boston to Seattle, returning Sun, Nov 23, priced at CA $375 found 5 days ago
Sat, Nov 8 - Tue, Nov 11
BOS
Boston
SEA
Seattle
CA $379 Roundtrip, found 4 days ago
CA $379
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, Nov 8 from Boston to Seattle, returning Tue, Nov 11, priced at CA $379 found 4 days ago
Sat, Nov 1 - Sat, Nov 8
BOS
Boston
SEA
Seattle
CA $380 Roundtrip, found 2 days ago
CA $380
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Nov 1 from Boston to Seattle, returning Sat, Nov 8, priced at CA $380 found 2 days ago
Thu, Dec 4 - Wed, Dec 10
BOS
Boston
SEA
Seattle
CA $389 Roundtrip, found 2 hours ago
CA $389
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Thu, Dec 4 from Boston to Seattle, returning Wed, Dec 10, priced at CA $389 found 2 hours 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.