San Francisco to Boston (SFO → BOS). We are tracking 16 fares on this route.
Cheapest tracked fare $131 · typical price $334 · you save about $203 (61%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
Frontier Airlines
2026-09-09
1 stop
$131
Frontier Airlines
2026-09-15
1 stop
$131
—
2026-09-28
1 stop
$140
—
2026-10-16
1 stop
$140
—
2026-11-02
1 stop
$140
JetBlue
2026-10-31
1 stop
$151
JetBlue
2026-10-10
Direct
$156
Alaska Airlines
2026-11-25
1 stop
$156
JetBlue
2026-09-26
Direct
$157
JetBlue
2026-09-23
Direct
$169
JetBlue
2026-09-05
Direct
$170
Alaska Airlines
2026-11-04
1 stop
$172
—
2027-01-20
1 stop
$180
Alaska Airlines
2026-11-05
1 stop
$181
JetBlue
2026-10-11
Direct
$183
United Airlines
2026-11-24
Direct
$200
Could you save more?
The airport you were going to fly from is often not the cheapest one. Compare every airport in a region against each other, or check whether a multi-day stopover beats the direct fare.
How cheap can flights from San Francisco to Boston get?
The cheapest fare we have tracked on this route is $131, compared with a typical $334 for a trip of this distance.
Is it cheaper to fly to Boston from a different airport?
Often, yes. Fares out of secondary airports are frequently cheaper than the obvious hub, but they are the ones most likely to be missing from a normal search. Our reverse search compares every airport in a region against each other so the cheaper departure point is not hidden.
Could a stopover make San Francisco to Boston cheaper?
Sometimes. On thin long-haul routes a two-leg trip with a multi-day stopover can beat the direct fare, and occasionally a direct fare is not sold at all. Our detour search prices those routings against the direct flight.