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
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Fair Availability
22% of dates checked are available within 10% of the lowest price
Saturday, August 29th, 2026
7 round-trip options
Returning
Thu, Sep 3, 2026•5 Day Trip
$342 USD
Returning
Fri, Sep 4, 2026•6 Day Trip
$342 USD
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Sat, Sep 5, 2026•7 Day Trip
$317 USD
Returning
Sun, Sep 6, 2026•8 Day Trip
$387 USD
Returning
Mon, Sep 7, 2026•9 Day Trip
$387 USD
Returning
Wed, Sep 9, 2026•11 Day Trip
$362 USD
Returning
Thu, Sep 10, 2026•12 Day Trip
$326 USD