Frontier AirlinesDepart08:40
Sun, Dec 6PHL → SFO
10h 45m · 3 stops
$151one way, per person
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- Cheapest fare
- $151
- Cheapest month
- December
- Direct flights
- Yes
- Flight time
- 6h 24m
Frontier Airlines · Sun, Dec 6
from $151
American Airlines
4,050 km
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Cheapest month to fly from Philadelphia to San Francisco
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in December 2026
The lowest fares we've seen for each day, cheapest first.
See every date in December 2026 →Plan the rest of your trip to San Francisco
Where to stay, what to do and getting around, from our travel partners.
About flights from Philadelphia to San Francisco
Philadelphia (PHL) and San Francisco (SFO) are about 4,050 km apart. Direct flights take around 6h 24m, and recent direct fares were with American Airlines. Over the next few months, one-way fares start from $151, and December 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Philadelphia to San Francisco?
The cheapest one-way fare we've seen recently is $151 with Frontier Airlines, departing Sunday, December 6, 2026. Over the coming months, the lowest fare in each month ranges from $151 to $198.
What is the cheapest month to fly from Philadelphia to San Francisco?
December 2026 currently has the lowest fares, from $151 one way.
Are there direct flights from Philadelphia to San Francisco?
Yes. Recent direct fares were with American Airlines.
How long is the flight from Philadelphia to San Francisco?
A direct flight takes about 6h 24m. Philadelphia and San Francisco are around 4,050 km apart.
Which airlines fly from Philadelphia to San Francisco?
Recent fares on this route were with Frontier Airlines and American Airlines.
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