San Francisco to Boston (SFO → BOS). We are tracking 32 fares on this route.
Cheapest tracked fare $139 · typical price $329 · you save about $190 (58%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
—
2026-11-14
1 stop
$139
—
2026-10-19
1 stop
$140
—
2026-10-16
1 stop
$145
—
2026-11-02
1 stop
$145
—
2026-10-27
1 stop
$147
—
2026-12-09
2 stops
$151
—
2026-10-28
1 stop
$151
—
2027-02-03
1 stop
$151
—
2027-03-01
1 stop
$151
Southwest Airlines
2026-12-08
1 stop
$154
—
2026-11-01
1 stop
$155
—
2026-11-04
1 stop
$157
—
2026-10-30
1 stop
$157
—
2026-12-10
1 stop
$157
—
2027-01-23
1 stop
$159
—
2026-12-02
Direct
$159
Alaska Airlines
2026-12-07
1 stop
$160
—
2026-10-31
1 stop
$163
—
2026-11-11
1 stop
$164
—
2026-12-04
1 stop
$165
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 $139, compared with a typical $329 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.