Cheap Flights from Seattle to Boston
Browse current best options from Seattle. Become a member to unlock all deals and get alerts when new deals appear.
Deals from
Seattle
RatePunk searches hundreds of travel sites at once for deals on flights to Boston
Prices updated 1 day ago
462 airlines compared
80%+ AI score for best value
Fares are subject to change and may not be available for all dates. (Data last updated Sep 15, 2026.)
Today’s best flight deals from Seattle to Boston
Explore current cheapest deals departing from Seattle to Boston
2026-10-24 – 2026-10-27
SEA - Boston
79% AI deal score
$309
$244
Round trip
2026-11-05 – 2026-11-10
SEA - Boston
71% AI deal score
$265
$289
Round trip
2026-10-23 – 2026-10-27
SEA - Boston
73% AI deal score
$309
$304
Round trip
2026-12-11 – 2026-12-15
SEA - Boston
75% AI deal score
$327
$304
Round trip
2026-10-21 – 2026-10-27
SEA - Boston
72% AI deal score
$294
$322
Round trip
2026-10-17 – 2026-10-24
SEA - Boston
70% AI deal score
$247
$323
Round trip
2026-10-24 – 2026-10-29
SEA - Boston
72% AI deal score
$303
$323
Round trip
2026-10-06 – 2026-10-14
SEA - Boston
70% AI deal score
$237
$331
Round trip
2026-11-14 – 2026-11-17
SEA - Boston
69% AI deal score
$271
$334
Round trip
2026-10-24 – 2026-10-26
SEA - Boston
69% AI deal score
$309
$335
Round trip
