Philadelphia to San Francisco (PHL → SFO). We are tracking 19 fares on this route.
Cheapest tracked fare $39 · typical price $223 · you save about $184 (83%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
Frontier
2026-11-21
1 stop
$39
—
2026-11-23
1 stop
$71
—
2026-10-28
1 stop
$136
—
2026-11-03
1 stop
$136
—
2026-11-04
1 stop
$136
—
2026-11-12
1 stop
$140
—
2026-10-21
1 stop
$140
—
2026-10-17
1 stop
$150
—
2026-10-24
1 stop
$150
—
2026-11-09
1 stop
$150
—
2026-11-02
1 stop
$156
—
2026-11-18
1 stop
$156
—
2026-12-08
1 stop
$159
—
2026-12-05
1 stop
$169
Frontier Airlines
2026-11-01
2 stops
$184
—
2027-02-13
1 stop
$185
—
2026-12-03
1 stop
$191
—
2027-01-06
1 stop
$200
—
2026-11-08
1 stop
$211
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 Philadelphia to San Francisco get?
The cheapest fare we have tracked on this route is $39, compared with a typical $223 for a trip of this distance.
Is it cheaper to fly to San Francisco 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 Philadelphia to San Francisco 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.