What's the cheapest day to fly in September?

We don't have enough real fare data for September to identify a cheapest weekday.

Is September a good time to visit Philadelphia?

Check the real weather data above for Philadelphia in September — we don't have crowd or event data to add beyond that.

Should I book now or wait?

There's no reliable way to predict whether a specific fare will rise or fall. If the real September fares above already fit your budget, booking removes the risk of the price changing.

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Flights from San Francisco to Philadelphia in September

Planning a trip from San Francisco to Philadelphia in September? Find the best flights and seasonal tips. Flight time: 5h 30m.

Flying in September

Philadelphia typically sees daytime highs around 26°C and overnight lows around 16°C in September, based on the last 3 years. Expect roughly 84 mm of rain across the month.

Nearby airports

Near San Francisco

San Carlos Airport (SQL)16 km
Metropolitan Oakland International Airport (OAK)18 km
Norman Y. Mineta San Jose International Airport (SJC)49 km

Near Philadelphia

New Castle Airport (ILG)38 km
Trenton Mercer Airport (TTN)58 km
Atlantic City International Airport (ACY)73 km

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More about this route

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FAQs — San Francisco to Philadelphia in September

We don't have real fare data for September on this route yet — use the search box above for live prices.