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
Sunday, August 16th, 2026
6 round-trip options
Returning
Sun, Aug 23, 2026•7 Day Trip
$447 USD
Returning
Mon, Aug 24, 2026•8 Day Trip
$431 USD
Returning
Tue, Aug 25, 2026•9 Day Trip
$400 USD
Returning
Thu, Aug 27, 2026•11 Day Trip
$431 USD
Returning
Sat, Aug 29, 2026•13 Day Trip
$422 USD
Returning
Sun, Aug 30, 2026•14 Day Trip
$447 USD