Seattle / Tacoma (SEA) to Boston (BOS) flight deal in economy from $273
SEASeattle–Tacoma International Airport
Seattle / Tacoma, United States
BOSLogan International Airport
Boston, United States
$412 USD
-34%$273 USD
Verified 18 days agoAugust 2026
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Limited Availability
16% of dates checked are available within 10% of the lowest price
Friday, August 28th, 2026
6 round-trip options
Returning
Fri, Sep 4, 2026•7 Day Trip
$351 USD
Returning
Sat, Sep 5, 2026•8 Day Trip
$320 USD
Returning
Sun, Sep 6, 2026•9 Day Trip
$351 USD
Returning
Tue, Sep 8, 2026•11 Day Trip
$320 USD
Returning
Thu, Sep 10, 2026•13 Day Trip
$347 USD
Returning
Fri, Sep 11, 2026•14 Day Trip
$347 USD