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 7 days ago
483 airlines compared
80%+ AI score for best value
Fares are subject to change and may not be available for all dates. (Data last updated Oct 26, 2026.)
Today’s best flight deals from Seattle to Boston
Explore current cheapest deals departing from Seattle to Boston
2026-12-07 – 2026-12-11
SEA - Boston
72% AI deal score
$318
$310
Round trip
2026-12-01 – 2026-12-09
SEA - Boston
73% AI deal score
$289
$315
Round trip
2026-11-13 – 2026-11-18
SEA - Boston
71% AI deal score
$269
$317
Round trip
2026-11-17 – 2026-12-08
SEA - Boston
70% AI deal score
$223
$317
Round trip
2026-12-05 – 2026-12-11
SEA - Boston
74% AI deal score
$302
$317
Round trip
2026-12-17 – 2026-12-24
SEA - Boston
73% AI deal score
$301
$324
Round trip
2026-12-16 – 2026-12-23
SEA - Boston
73% AI deal score
$301
$326
Round trip
2026-11-14 – 2026-11-18
SEA - Boston
70% AI deal score
$282
$331
Round trip
2026-11-14 – 2026-11-19
SEA - Boston
70% AI deal score
$269
$331
Round trip
2026-11-14 – 2026-11-17
SEA - Boston
70% AI deal score
$282
$331
Round trip
