Philadelphia to San Francisco (PHL → SFO). We are tracking 6 fares on this route.
Cheapest tracked fare $127 · typical price $303 · you save about $176 (58%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
Frontier Airlines
2026-10-13
1 stop
$127
—
2026-09-23
1 stop
$137
—
2026-10-14
1 stop
$137
—
2026-11-12
1 stop
$137
Frontier Airlines
2026-09-09
1 stop
$138
Frontier Airlines
2026-10-17
1 stop
$140
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 $127, compared with a typical $303 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.