Boston (BOS) to Seattle / Tacoma (SEA) flight deal in economy from $273
BOSLogan International Airport
Boston, United States
SEASeattle–Tacoma International Airport
Seattle / Tacoma, United States
$405 USD
-33%$273 USD
Verified 13 days agoAugust 2026
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Fair Availability
22% of dates checked are available within 10% of the lowest price
Tuesday, August 25th, 2026
7 round-trip options
Returning
Sun, Aug 30, 2026•5 Day Trip
$400 USD
Returning
Mon, Aug 31, 2026•6 Day Trip
$340 USD
Returning
Tue, Sep 1, 2026•7 Day Trip
$320 USD
Returning
Wed, Sep 2, 2026•8 Day Trip
$295 USD
Returning
Thu, Sep 3, 2026•9 Day Trip
$320 USD
Returning
Sat, Sep 5, 2026•11 Day Trip
$295 USD
Returning
Sun, Sep 6, 2026•12 Day Trip
$365 USD