Cheap Flights from Boston to Seattle
Browse current best options from Boston. Become a member to unlock all deals and get alerts when new deals appear.
Deals from
Boston
RatePunk searches hundreds of travel sites at once for deals on flights to Seattle
Prices updated 1 day ago
461 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 14, 2026.)
Today’s best flight deals from Boston to Seattle
Explore current cheapest deals departing from Boston to Seattle
2026-12-09 – 2026-12-12
BOS - Seattle
83% AI deal score
$331
$244
Round trip
2027-01-13 – 2027-01-20
BOS - Seattle
76% AI deal score
$288
$244
Round trip
2027-02-03 – 2027-02-10
BOS - Seattle
82% AI deal score
$313
$244
Round trip
2027-02-24 – 2027-03-02
BOS - Seattle
84% AI deal score
$336
$244
Round trip
2027-02-24 – 2027-03-03
BOS - Seattle
84% AI deal score
$337
$244
Round trip
2026-10-27 – 2026-10-31
BOS - Seattle
79% AI deal score
$300
$245
Round trip
2026-11-07 – 2026-11-14
BOS - Seattle
85% AI deal score
$326
$249
Round trip
2026-11-14 – 2026-11-17
BOS - Seattle
83% AI deal score
$341
$249
Round trip
2026-10-21 – 2026-11-04
BOS - Seattle
71% AI deal score
$258
$250
Round trip
2026-11-11 – 2026-11-16
BOS - Seattle
77% AI deal score
$336
$284
Round trip
