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 $296 round trip and CA $149 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Sep. 27 - Sat, Oct. 4
BOS
Boston
SEA
Seattle
CA $296 Roundtrip, found 3 days ago
CA $296
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Sep. 27 from Boston to Seattle, returning Sat, Oct. 4, priced at CA $296 found 3 days ago
Sat, Sep. 27 - Sat, Oct. 4
BOS
Boston
SEA
Seattle
CA $298 Roundtrip, found 3 days ago
CA $298
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Sat, Sep. 27 from Boston to Seattle, returning Sat, Oct. 4, priced at CA $298 found 3 days ago
Sat, Sep. 13 - Sat, Sep. 20
BOS
Boston
SEA
Seattle
CA $302 Roundtrip, found 4 hours ago
CA $302
Roundtrip
found 4 hours ago
Select JetBlue Airways flight, departing Sat, Sep. 13 from Boston to Seattle, returning Sat, Sep. 20, priced at CA $302 found 4 hours ago
Sat, Sep. 13 - Sat, Sep. 20
BOS
Boston
SEA
Seattle
CA $303 Roundtrip, found 4 hours ago
CA $303
Roundtrip
found 4 hours ago
Select JetBlue Airways flight, departing Sat, Sep. 13 from Boston to Seattle, returning Sat, Sep. 20, priced at CA $303 found 4 hours ago
Sat, Sep. 6 - Sat, Sep. 20
BOS
Boston
SEA
Seattle
CA $342 Roundtrip, found 1 day ago
CA $342
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Sep. 6 from Boston to Seattle, returning Sat, Sep. 20, priced at CA $342 found 1 day ago
Tue, Sep. 16 - Tue, Sep. 23
BOS
Boston
SEA
Seattle
CA $344 Roundtrip, found 8 hours ago
CA $344
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Tue, Sep. 16 from Boston to Seattle, returning Tue, Sep. 23, priced at CA $344 found 8 hours ago
Tue, Sep. 16 - Tue, Sep. 23
BOS
Boston
SEA
Seattle
CA $345 Roundtrip, found 8 hours ago
CA $345
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Tue, Sep. 16 from Boston to Seattle, returning Tue, Sep. 23, priced at CA $345 found 8 hours ago
Sat, Sep. 6 - Sat, Sep. 20
BOS
Boston
SEA
Seattle
CA $363 Roundtrip, found 1 day ago
CA $363
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Sat, Sep. 6 from Boston to Seattle, returning Sat, Sep. 20, priced at CA $363 found 1 day ago
Sat, Sep. 6 - Sat, Sep. 20
BOS
Boston
SEA
Seattle
CA $365 Roundtrip, found 1 day ago
CA $365
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Sep. 6 from Boston to Seattle, returning Sat, Sep. 20, priced at CA $365 found 1 day ago
Tue, Sep. 16 - Tue, Sep. 23
BOS
Boston
SEA
Seattle
CA $385 Roundtrip, found 8 hours ago
CA $385
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Tue, Sep. 16 from Boston to Seattle, returning Tue, Sep. 23, priced at CA $385 found 8 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.
*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.