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Cheap flights from Philadelphia (PHL) to Denver (DEN)

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0 Children (2~11)
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How to find the cheapest flight from Philadelphia (PHL) to Denver (DEN)

How to find the cheapest flight from Philadelphia (PHL) to Denver (DEN)
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How to find the cheapest flight from Philadelphia (PHL) to Denver (DEN)
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How to find the cheapest flight from Philadelphia (PHL) to Denver (DEN)
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Cheap flights from Philadelphia to Denver in December 2025 , January 2026

25 Dec - 10 Jan $ 227.00
PHL
Philadelphia
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
1 STOPS
PHL
Philadelphia
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25 Dec - 12 Jan $ 247.00
PHL
Philadelphia
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
PHL
Philadelphia
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25 Dec - 01 Jan $ 303.00
PHL
Philadelphia
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
PHL
Philadelphia
Pick dates

Last minute flights from Philadelphia to Denver

25 Dec - 31 Dec $ 234.00
PHL
Philadelphia
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
1 STOPS
PHL
Philadelphia
Pick dates
31 Dec - 31 Dec $ 293.00
PHL
Philadelphia
United Airlines
DIRECT
DEN
Denver
DEN
Denver
United Airlines
DIRECT
PHL
Philadelphia
Pick dates
25 Dec - 31 Dec $ 479.00
PHL
Philadelphia
United Airlines
DIRECT
DEN
Denver
DEN
Denver
United Airlines
DIRECT
PHL
Philadelphia
Pick dates

One-way flights to Denver from Philadelphia

8:36 PM - 8:36 PM
Frontier Airlines
0 Stops
4h 23m
PHL - DEN
$ 131
Kiwi
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8:36 PM - 8:36 PM
Frontier Airlines
0 Stops
4h 23m
PHL - DEN
$ 279
Kiwi
Pick dates
6:35 AM - 8:45 AM
United Airlines
1 Stops
6h
PHL - DEN
$ 548
Kiwi
Pick dates

How to find the cheapest flight from Philadelphia (PHL) to Denver (DEN)

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