Cheap Flights from San Francisco to Boston
Browse current best options from San Francisco. Become a member to unlock all deals and get alerts when new deals appear.
Deals from
San Francisco
RatePunk searches hundreds of travel sites at once for deals on flights to Boston
Prices updated 6 days ago
406 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 2, 2026.)
Today’s best flight deals from San Francisco to Boston
Explore current cheapest deals departing from San Francisco to Boston
2026-08-23 – 2026-08-28
SFO - Boston
90% AI deal score
$482
$243
Round trip
2026-09-09 – 2026-09-16
SFO - Boston
84% AI deal score
$338
$245
Round trip
2026-08-24 – 2026-08-29
SFO - Boston
90% AI deal score
$483
$246
Round trip
2026-09-09 – 2026-09-15
SFO - Boston
83% AI deal score
$338
$247
Round trip
2026-09-05 – 2026-09-11
SFO - Boston
83% AI deal score
$339
$247
Round trip
2026-09-08 – 2026-09-11
SFO - Boston
84% AI deal score
$357
$247
Round trip
2026-08-23 – 2026-08-29
SFO - Boston
89% AI deal score
$466
$248
Round trip
2026-08-26 – 2026-08-31
SFO - Boston
90% AI deal score
$484
$249
Round trip
2026-08-24 – 2026-08-31
SFO - Boston
89% AI deal score
$466
$249
Round trip
2026-09-25 – 2026-09-30
SFO - Boston
84% AI deal score
$351
$249
Round trip
