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 $321 round trip and CA $162 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Oct 31 - Wed, Nov 4
SEA
Seattle
BOS
Boston
CA $321 Roundtrip, found 8 hours ago
CA $321
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Sat, Oct 31 from Seattle to Boston, returning Wed, Nov 4, priced at CA $321 found 8 hours ago
Sat, Oct 31 - Wed, Nov 4
SEA
Seattle
BOS
Boston
CA $322 Roundtrip, found 8 hours ago
CA $322
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Sat, Oct 31 from Seattle to Boston, returning Wed, Nov 4, priced at CA $322 found 8 hours ago
Tue, Sep 29 - Tue, Oct 20
SEA
Seattle
BOS
Boston
CA $325 Roundtrip, found 5 days ago
CA $325
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Sep 29 from Seattle to Boston, returning Tue, Oct 20, priced at CA $325 found 5 days ago
Wed, Mar 18 - Tue, Mar 31
SEA
Seattle
BOS
Boston
CA $332 Roundtrip, just found
CA $332
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Mar 18 from Seattle to Boston, returning Tue, Mar 31, priced at CA $332 just found
Sat, Oct 31 - Wed, Nov 4
SEA
Seattle
BOS
Boston
CA $334 Roundtrip, found 8 hours ago
CA $334
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Sat, Oct 31 from Seattle to Boston, returning Wed, Nov 4, priced at CA $334 found 8 hours ago
Tue, Sep 29 - Tue, Oct 20
SEA
Seattle
BOS
Boston
CA $338 Roundtrip, found 5 days ago
CA $338
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Sep 29 from Seattle to Boston, returning Tue, Oct 20, priced at CA $338 found 5 days ago
Sat, Feb 28 - Sat, Mar 7
SEA
Seattle
BOS
Boston
CA $360 Roundtrip, found 10 hours ago
CA $360
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Sat, Feb 28 from Seattle to Boston, returning Sat, Mar 7, priced at CA $360 found 10 hours ago
Sat, Feb 28 - Sat, Mar 7
SEA
Seattle
BOS
Boston
CA $361 Roundtrip, found 3 days ago
CA $361
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Feb 28 from Seattle to Boston, returning Sat, Mar 7, priced at CA $361 found 3 days ago
Sat, Oct 31 - Wed, Nov 4
SEA
Seattle
BOS
Boston
CA $368 Roundtrip, found 8 hours ago
CA $368
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Sat, Oct 31 from Seattle to Boston, returning Wed, Nov 4, priced at CA $368 found 8 hours ago
Thu, Aug 27 - Wed, Sep 2
SEA
Seattle
BOS
Boston
CA $369 Roundtrip, found 1 day ago
CA $369
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Thu, Aug 27 from Seattle to Boston, returning Wed, Sep 2, priced at CA $369 found 1 day 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.

Popular Flight Routes from Seattle (SEA)

Travelers at SEA love to visit these top cities. Roam to the top destinations from Seattle (SEA) today with the cheap prices from Travelocity!

Popular Flight Routes from Boston (BOS)

Travelers at BOS love to visit these top cities. Roam to the top destinations from Boston(BOS) today with the cheap prices from Travelocity!

*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.