CA $135 Cheap Alaska Airlines fights from Seattle (SEA) to Boston (BOS)

View CA $135 flight on Tue, Nov. 4, 2025Opens in a new window

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Alaska Airlines flights from Seattle to Boston (SEA→BOS)

Prices were available within the past 7 days and start at CA $135 for one-way flights and CA $283 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat., Sep. 27 - Tue., Sep. 30
SEA
Seattle
BOS
Boston
CA $283 Roundtrip, found 2 days ago
CA $283
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat., Sep. 27 from Seattle to Boston, returning Tue., Sep. 30, priced at CA $283 found 2 days ago
Alaska Airlines
Sat., Sep. 27 - Tue., Sep. 30
SEA
Seattle
BOS
Boston
CA $286 Roundtrip, found 2 days ago
CA $286
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat., Sep. 27 from Seattle to Boston, returning Tue., Sep. 30, priced at CA $286 found 2 days ago
Alaska Airlines
Wed., Sep. 3 - Wed., Sep. 3
SEA
Seattle
BOS
Boston
CA $288 Roundtrip, just found
CA $288
Roundtrip
just found
Select Alaska Airlines flight, departing Wed., Sep. 3 from Seattle to Boston, returning Wed., Sep. 3, priced at CA $288 just found
Alaska Airlines
Wed., Sep. 3 - Sat., Sep. 6
SEA
Seattle
BOS
Boston
CA $296 Roundtrip, just found
CA $296
Roundtrip
just found
Select Alaska Airlines flight, departing Wed., Sep. 3 from Seattle to Boston, returning Sat., Sep. 6, priced at CA $296 just found
Alaska Airlines
Wed., Sep. 3 - Wed., Sep. 10
SEA
Seattle
BOS
Boston
CA $298 Roundtrip, found 15 hours ago
CA $298
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Wed., Sep. 3 from Seattle to Boston, returning Wed., Sep. 10, priced at CA $298 found 15 hours ago
Alaska Airlines
Wed., Sep. 3 - Wed., Sep. 10
SEA
Seattle
BOS
Boston
CA $309 Roundtrip, found 15 hours ago
CA $309
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Wed., Sep. 3 from Seattle to Boston, returning Wed., Sep. 10, priced at CA $309 found 15 hours ago
Flight from Seattle to Boston (SEA - BOS) route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Logan Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, JetBlue Airways, Spirit Airlines, Sun Country Airlines, United
Popular airline
JetBlue Airways
Distance
3980 km
Average flight time
8 hours 24 mins
*Available to Expedia members.