Cheap flights from Philadelphia to San Francisco
The cheapest round trip from Philadelphia to San Francisco that travelers found recently is $353 with a carry-on: a $353 fare on Alaska Airlines, which usually includes a carry-on. It leaves Thu, Nov 19 and comes back Sun, Nov 22.
Live prices for Thu, Nov 19 to Sun, Nov 22
Cheapest trips travelers found recently
| Leave | Return | Airline | Airports | Stops | Fare | Carry-on (est.) | Total | Live prices |
|---|---|---|---|---|---|---|---|---|
| Thu, Nov 19 | Sun, Nov 22 | Alaska Airlines | PHL → SFO | 1 stop | $353 | Included | $353 | Live price |
| Thu, Nov 26 | Mon, Nov 30 | Southwest | PHL → SJC | 1 stop | $388 | Included | $388 | Live price |
| Sun, Oct 18 | Thu, Oct 22 | Frontier | PHL → SFO | 1 stop | $420 | +$110 | $530 | Live price |
Round-trip prices per person, from real fares travelers found in the last few days. Carry-on fees are our estimate for each airline, both ways. Prices change fast: check the live price before you book.
Cheapest month to fly
| Month | Cheapest trip | From | Live prices |
|---|---|---|---|
| October 2026 | Sun, Oct 18 to Thu, Oct 22, 4 nights | $530 | Live price |
| November 2026 | Thu, Nov 19 to Sun, Nov 22, 3 nights | $353 | Live price |
Bag fees on this route
What the airlines flying Philadelphia to San Francisco usually charge for one bag each way. Budget airlines often sell the cheapest fares and charge the most for bags, so compare the total, not the fare.
| Airline | Carry-on, each way | Checked bag, each way |
|---|---|---|
| Alaska Airlines | Included | $40 |
| Frontier | $55 | $50 |
| Southwest | Included | $35 |
Our estimates: fees depend on the fare type and when you pay. Check the airline's own price when you book.
How these prices work
These are real round-trip fares that travelers found on Aviasales recently, not a live search, so they can change or sell out. Dipt adds an estimate of each airline's carry-on fee, so a cheap fare with expensive bags doesn't look cheaper than it is. "Live price" opens Dipt's live flight search for those dates, where you book with the airline or travel site you pick. Dipt may earn a commission when you book, at no extra cost to you (how Dipt makes money).
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