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Cheap flights from St Louis (STL) to Philadelphia (PHL)

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1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
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How to find the cheapest flight from St Louis (STL) to Philadelphia (PHL)

How to find the cheapest flight from St Louis (STL) to Philadelphia (PHL)
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How to find the cheapest flight from St Louis (STL) to Philadelphia (PHL)
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How to find the cheapest flight from St Louis (STL) to Philadelphia (PHL)
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Cheap flights from St Louis to Philadelphia in October , November 2026

31 Oct - 14 Nov $ 252.00
STL
St Louis
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
STL
St Louis
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28 Oct - 04 Nov $ 278.00
STL
St Louis
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
STL
St Louis
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23 Oct - 04 Nov $ 350.00
STL
St Louis
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
STL
St Louis
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Last minute flights from St Louis to Philadelphia

28 Oct - 31 Oct $ 298.00
STL
St Louis
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
STL
St Louis
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29 Oct - 31 Oct $ 335.00
STL
St Louis
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
STL
St Louis
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24 Oct - 31 Oct $ 730.00
STL
St Louis
United Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
United Airlines
1 STOPS
STL
St Louis
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One-way flights to Philadelphia from St Louis

4:26 PM - 9:08 PM
Frontier Airlines
1 Stops
6h 16m
STL - PHL
$ 146
Kiwi
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6:44 PM - 5:05 AM
Frontier Airlines
1 Stops
11h 27m
STL - PHL
$ 151
Kiwi
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4:26 PM - 9:08 PM
Frontier Airlines
1 Stops
6h 16m
STL - PHL
$ 187
Kiwi
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How to find the cheapest flight from St Louis (STL) to Philadelphia (PHL)

Related info for your journey
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How to find the cheapest flight from St Louis (STL) to Philadelphia (PHL)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Philadelphia (PHL)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.