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 $503 round trip and CA $210 one way. Prices and availability subject to change. Additional terms may apply.

Tue, May 12 - Mon, May 25
BOS
Boston
SEA
Seattle
CA $503 Roundtrip, found 2 days ago
CA $503
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, May 12 from Boston to Seattle, returning Mon, May 25, priced at CA $503 found 2 days ago
Fri, May 15 - Sun, May 24
BOS
Boston
SEA
Seattle
CA $518 Roundtrip, found 4 days ago
CA $518
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Fri, May 15 from Boston to Seattle, returning Sun, May 24, priced at CA $518 found 4 days ago
Fri, May 15 - Sun, May 24
BOS
Boston
SEA
Seattle
CA $519 Roundtrip, found 4 days ago
CA $519
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Fri, May 15 from Boston to Seattle, returning Sun, May 24, priced at CA $519 found 4 days ago
Tue, Apr 28 - Sun, May 3
BOS
Boston
SEA
Seattle
CA $532 Roundtrip, found 1 day ago
CA $532
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Apr 28 from Boston to Seattle, returning Sun, May 3, priced at CA $532 found 1 day ago
Thu, Apr 9 - Mon, Apr 13
BOS
Boston
SEA
Seattle
CA $540 Roundtrip, found 6 days ago
CA $540
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Apr 9 from Boston to Seattle, returning Mon, Apr 13, priced at CA $540 found 6 days ago
Fri, May 15 - Sun, May 24
BOS
Boston
SEA
Seattle
CA $546 Roundtrip, found 4 days ago
CA $546
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Fri, May 15 from Boston to Seattle, returning Sun, May 24, priced at CA $546 found 4 days ago
Wed, Jun 24 - Tue, Jul 7
BOS
Boston
SEA
Seattle
CA $547 Roundtrip, found 1 day ago
CA $547
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Wed, Jun 24 from Boston to Seattle, returning Tue, Jul 7, priced at CA $547 found 1 day ago
Fri, May 15 - Sun, May 24
BOS
Boston
SEA
Seattle
CA $553 Roundtrip, found 4 days ago
CA $553
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Fri, May 15 from Boston to Seattle, returning Sun, May 24, priced at CA $553 found 4 days ago
Fri, May 15 - Sun, May 24
BOS
Boston
SEA
Seattle
CA $554 Roundtrip, found 4 days ago
CA $554
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Fri, May 15 from Boston to Seattle, returning Sun, May 24, priced at CA $554 found 4 days ago
Thu, Aug 27 - Mon, Aug 31
BOS
Boston
SEA
Seattle
CA $559 Roundtrip, found 3 days ago
CA $559
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Aug 27 from Boston to Seattle, returning Mon, Aug 31, priced at CA $559 found 3 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.

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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.