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 $271 round trip and CA $123 one way. Prices and availability subject to change. Additional terms may apply.

Thu, Nov. 6 - Wed, Nov. 12
BOS
Boston
SEA
Seattle
CA $271 Roundtrip, found 3 days ago
CA $271
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Nov. 6 from Boston to Seattle, returning Wed, Nov. 12, priced at CA $271 found 3 days ago
Wed, Sep. 10 - Wed, Sep. 24
BOS
Boston
SEA
Seattle
CA $276 Roundtrip, found 6 days ago
CA $276
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Sep. 10 from Boston to Seattle, returning Wed, Sep. 24, priced at CA $276 found 6 days ago
Wed, Sep. 10 - Wed, Sep. 24
BOS
Boston
SEA
Seattle
CA $277 Roundtrip, found 6 days ago
CA $277
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Wed, Sep. 10 from Boston to Seattle, returning Wed, Sep. 24, priced at CA $277 found 6 days ago
Thu, Oct. 30 - Mon, Nov. 3
BOS
Boston
SEA
Seattle
CA $300 Roundtrip, found 3 days ago
CA $300
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Oct. 30 from Boston to Seattle, returning Mon, Nov. 3, priced at CA $300 found 3 days ago
Sat, Sep. 27 - Mon, Oct. 6
BOS
Boston
SEA
Seattle
CA $334 Roundtrip, found 10 hours ago
CA $334
Roundtrip
found 10 hours ago
Select JetBlue Airways flight, departing Sat, Sep. 27 from Boston to Seattle, returning Mon, Oct. 6, priced at CA $334 found 10 hours ago
Sat, Sep. 13 - Sat, Sep. 20
BOS
Boston
SEA
Seattle
CA $348 Roundtrip, found 2 days ago
CA $348
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Sat, Sep. 13 from Boston to Seattle, returning Sat, Sep. 20, priced at CA $348 found 2 days ago
Thu, Oct. 30 - Mon, Nov. 3
BOS
Boston
SEA
Seattle
CA $348 Roundtrip, found 3 days ago
CA $348
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Oct. 30 from Boston to Seattle, returning Mon, Nov. 3, priced at CA $348 found 3 days ago
Thu, Oct. 30 - Mon, Nov. 3
BOS
Boston
SEA
Seattle
CA $354 Roundtrip, found 3 days ago
CA $354
Roundtrip
found 3 days ago
Select Delta flight, departing Thu, Oct. 30 from Boston to Seattle, returning Mon, Nov. 3, priced at CA $354 found 3 days ago
Thu, Oct. 30 - Mon, Nov. 3
BOS
Boston
SEA
Seattle
CA $367 Roundtrip, found 3 days ago
CA $367
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Oct. 30 from Boston to Seattle, returning Mon, Nov. 3, priced at CA $367 found 3 days ago
Sat, Sep. 13 - Sat, Sep. 20
BOS
Boston
SEA
Seattle
CA $374 Roundtrip, found 2 days ago
CA $374
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Sep. 13 from Boston to Seattle, returning Sat, Sep. 20, priced at CA $374 found 2 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.
*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.