Cheap Flights From Seattle - Tacoma Intl. (SEA) To Logan Intl. (BOS)

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Cheapest Flights from Seattle (SEA) to Boston (BOS)

The cheapest flights to Logan Intl. found within the past 7 days were CA $359 round trip and CA $183 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Mar 11 - Tue, Mar 17
SEA
Seattle
BOS
Boston
CA $359 Roundtrip, found 2 days ago
CA $359
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Mar 11 from Seattle to Boston, returning Tue, Mar 17, priced at CA $359 found 2 days ago
Wed, Jan 28 - Wed, Feb 4
SEA
Seattle
BOS
Boston
CA $361 Roundtrip, found 4 days ago
CA $361
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed, Jan 28 from Seattle to Boston, returning Wed, Feb 4, priced at CA $361 found 4 days ago
Sat, Jan 24 - Sat, Jan 31
SEA
Seattle
BOS
Boston
CA $361 Roundtrip, found 3 days ago
CA $361
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Jan 24 from Seattle to Boston, returning Sat, Jan 31, priced at CA $361 found 3 days ago
Wed, Jan 28 - Wed, Feb 4
SEA
Seattle
BOS
Boston
CA $365 Roundtrip, found 4 days ago
CA $365
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed, Jan 28 from Seattle to Boston, returning Wed, Feb 4, priced at CA $365 found 4 days ago
Wed, Mar 11 - Tue, Mar 17
SEA
Seattle
BOS
Boston
CA $387 Roundtrip, found 2 days ago
CA $387
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Mar 11 from Seattle to Boston, returning Tue, Mar 17, priced at CA $387 found 2 days ago
Tue, Jan 20 - Sat, Jan 24
SEA
Seattle
BOS
Boston
CA $394 Roundtrip, found 3 days ago
CA $394
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Jan 20 from Seattle to Boston, returning Sat, Jan 24, priced at CA $394 found 3 days ago
Wed, Jan 28 - Wed, Feb 4
SEA
Seattle
BOS
Boston
CA $402 Roundtrip, found 4 days ago
CA $402
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed, Jan 28 from Seattle to Boston, returning Wed, Feb 4, priced at CA $402 found 4 days ago
Wed, Jan 28 - Wed, Feb 4
SEA
Seattle
BOS
Boston
CA $407 Roundtrip, found 4 days ago
CA $407
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed, Jan 28 from Seattle to Boston, returning Wed, Feb 4, priced at CA $407 found 4 days ago
Sun, Mar 1 - Wed, Mar 4
SEA
Seattle
BOS
Boston
CA $408 Roundtrip, found 2 days ago
CA $408
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sun, Mar 1 from Seattle to Boston, returning Wed, Mar 4, priced at CA $408 found 2 days ago
Sat, Jan 31 - Mon, Feb 9
SEA
Seattle
BOS
Boston
CA $412 Roundtrip, found 4 days ago
CA $412
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, Jan 31 from Seattle to Boston, returning Mon, Feb 9, priced at CA $412 found 4 days ago

Frequently asked questions

Are there direct flights from Sea-Tac Airport to BOS?
If you're looking to venture from SEA to BOS in the shortest possible time, you'll be glad to know multiple airlines operate nonstop flights. Choose your preferred seat with Delta or Alaska Airlines.
What airlines fly from Sea-Tac Airport to BOS?
There are a couple of airlines advertising direct flights from SEA to Logan Intl. Airport (BOS). Delta (DL) is one of the most reliable, and operates 86 flights every month. If that's not enough for you, have a look at the fares on offer from Alaska Airlines (AS). This airline operates 82 flights on the Seattle to Boston route each month. Between the two, you're bound to find the flight to suit your travel needs.
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.