Cheap Flights from Boston to Seattle
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Deals from
Boston
RatePunk searches hundreds of travel sites at once for deals on flights to Seattle
Prices updated 2 days ago
451 airlines compared
80%+ AI score for best value
Fares are subject to change and may not be available for all dates. (Data last updated Aug 17, 2026.)
Today’s best flight deals from Boston to Seattle
Explore current cheapest deals departing from Boston to Seattle
2026-11-11 – 2026-11-17
BOS - Seattle
88% AI deal score
$334
$220
Round trip
2026-10-27 – 2026-11-03
BOS - Seattle
84% AI deal score
$292
$220
Round trip
2026-11-11 – 2026-11-14
BOS - Seattle
87% AI deal score
$345
$241
Round trip
2026-12-02 – 2026-12-08
BOS - Seattle
85% AI deal score
$354
$241
Round trip
2026-11-05 – 2026-11-09
BOS - Seattle
79% AI deal score
$343
$268
Round trip
2026-12-03 – 2026-12-07
BOS - Seattle
85% AI deal score
$363
$268
Round trip
2026-10-22 – 2026-10-27
BOS - Seattle
75% AI deal score
$300
$272
Round trip
2026-11-13 – 2026-11-18
BOS - Seattle
79% AI deal score
$347
$273
Round trip
2026-09-15 – 2026-09-19
BOS - Seattle
76% AI deal score
$312
$276
Round trip
2026-09-15 – 2026-09-26
BOS - Seattle
72% AI deal score
$271
$276
Round trip
