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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 May , June 2026

28 May - 04 Jun $ 491.00
STL
St Louis
United Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
United Airlines
1 STOPS
STL
St Louis
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16 May - 19 Jun $ 758.00
STL
St Louis
United Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
United Airlines
1 STOPS
STL
St Louis
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16 May - 18 Jun $ 763.00
STL
St Louis
United Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
United Airlines
1 STOPS
STL
St Louis
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Last minute flights from St Louis to Philadelphia

27 May - 31 May $ 578.00
STL
St Louis
United Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
United Airlines
1 STOPS
STL
St Louis
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25 May - 31 May $ 752.00
STL
St Louis
United Airlines
1 STOPS
PHL
Philadelphia
PHL
Philadelphia
United Airlines
1 STOPS
STL
St Louis
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25 May - 31 May $ 875.00
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

8:43 AM - 12:55 PM
United Airlines
1 Stops
4h 27m
STL - PHL
$ 279
Kiwi
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1:13 PM - 3:56 PM
United Airlines
1 Stops
5h 5m
STL - PHL
$ 279
Kiwi
Pick dates
8:43 AM - 12:55 PM
United Airlines
1 Stops
4h 27m
STL - PHL
$ 454
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.