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

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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 February , March 2026

25 Feb - 18 Mar $ 192.00
STL
St Louis
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
STL
St Louis
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14 Feb - 08 Mar $ 935.00
STL
St Louis
Hawaiian Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Hawaiian Airlines
1 STOPS
STL
St Louis
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07 Feb - 08 Mar $ 1,152.00
STL
St Louis
Hawaiian Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Hawaiian Airlines
1 STOPS
STL
St Louis
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Last minute flights from St Louis to Philadelphia

25 Feb - 28 Feb $ 320.00
STL
St Louis
Frontier Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
1 STOPS
STL
St Louis
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14 Feb - 01 Mar $ 935.00
STL
St Louis
Hawaiian Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Hawaiian Airlines
1 STOPS
STL
St Louis
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07 Feb - 01 Mar $ 1,152.00
STL
St Louis
Hawaiian Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
Hawaiian Airlines
1 STOPS
STL
St Louis
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One-way flights to Philadelphia from St Louis

8:22 PM - 9:05 AM
Frontier Airlines
1 Stops
13h 51m
STL - PHL
$ 117
Kiwi
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8:30 AM - 12:55 PM
United Airlines
1 Stops
4h 40m
STL - PHL
$ 416
Kiwi
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6:30 AM - 8:56 AM
United Airlines
1 Stops
4h 37m
STL - PHL
$ 462
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.