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 $418 round trip and CA $198 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Sep 26 - Tue, Oct 6
BOS
Boston
SEA
Seattle
CA $418 Roundtrip, found 2 days ago
CA $418
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Sat, Sep 26 from Boston to Seattle, returning Tue, Oct 6, priced at CA $418 found 2 days ago
Mon, Jun 1 - Wed, Jun 10
BOS
Boston
SEA
Seattle
CA $419 Roundtrip, found 2 days ago
CA $419
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Mon, Jun 1 from Boston to Seattle, returning Wed, Jun 10, priced at CA $419 found 2 days ago
Sat, Nov 7 - Sat, Nov 14
BOS
Boston
SEA
Seattle
CA $419 Roundtrip, found 3 days ago
CA $419
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Nov 7 from Boston to Seattle, returning Sat, Nov 14, priced at CA $419 found 3 days ago
Sun, May 24 - Tue, Jun 2
BOS
Boston
SEA
Seattle
CA $439 Roundtrip, found 3 days ago
CA $439
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Sun, May 24 from Boston to Seattle, returning Tue, Jun 2, priced at CA $439 found 3 days ago
Wed, Jun 3 - Mon, Jun 8
BOS
Boston
SEA
Seattle
CA $445 Roundtrip, found 18 hours ago
CA $445
Roundtrip
found 18 hours ago
Select JetBlue Airways flight, departing Wed, Jun 3 from Boston to Seattle, returning Mon, Jun 8, priced at CA $445 found 18 hours ago
Tue, Jul 21 - Tue, Jul 28
BOS
Boston
SEA
Seattle
CA $446 Roundtrip, found 2 days ago
CA $446
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Jul 21 from Boston to Seattle, returning Tue, Jul 28, priced at CA $446 found 2 days ago
Wed, Jun 3 - Mon, Jun 8
BOS
Boston
SEA
Seattle
CA $455 Roundtrip, found 18 hours ago
CA $455
Roundtrip
found 18 hours ago
Select JetBlue Airways flight, departing Wed, Jun 3 from Boston to Seattle, returning Mon, Jun 8, priced at CA $455 found 18 hours ago
Wed, Jun 3 - Mon, Jun 8
BOS
Boston
SEA
Seattle
CA $465 Roundtrip, found 18 hours ago
CA $465
Roundtrip
found 18 hours ago
Select Alaska Airlines flight, departing Wed, Jun 3 from Boston to Seattle, returning Mon, Jun 8, priced at CA $465 found 18 hours ago
Sat, Sep 26 - Tue, Oct 6
BOS
Boston
SEA
Seattle
CA $466 Roundtrip, found 2 days ago
CA $466
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Sat, Sep 26 from Boston to Seattle, returning Tue, Oct 6, priced at CA $466 found 2 days ago
Wed, Jun 10 - Tue, Jul 28
BOS
Boston
SEA
Seattle
CA $470 Roundtrip, found 1 day ago
CA $470
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Jun 10 from Boston to Seattle, returning Tue, Jul 28, priced at CA $470 found 1 day 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.

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*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.