Flights from Boston to San Francisco — [2026]
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 San Francisco
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 Boston to San Francisco
Explore current cheapest deals departing from Boston to San Francisco
2027-01-22 – 2027-01-26
BOS - San Francisco
88% AI deal score
$262
$191
Round trip
2027-01-22 – 2027-02-06
BOS - San Francisco
86% AI deal score
$236
$192
Round trip
2027-01-22 – 2027-01-27
BOS - San Francisco
88% AI deal score
$263
$192
Round trip
2027-01-22 – 2027-02-09
BOS - San Francisco
85% AI deal score
$233
$192
Round trip
2027-02-02 – 2027-02-06
BOS - San Francisco
90% AI deal score
$285
$193
Round trip
2027-01-19 – 2027-02-06
BOS - San Francisco
80% AI deal score
$230
$193
Round trip
2027-01-29 – 2027-02-06
BOS - San Francisco
87% AI deal score
$253
$193
Round trip
2027-01-19 – 2027-01-27
BOS - San Francisco
87% AI deal score
$247
$193
Round trip
2026-12-05 – 2026-12-09
BOS - San Francisco
91% AI deal score
$331
$197
Round trip
2026-12-05 – 2026-12-08
BOS - San Francisco
91% AI deal score
$331
$197
Round trip
