Earn point on your loyalty program!arrow arc left

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

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

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

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

Cheap flights from Denver to Philadelphia in July , August 2026

25 Jul - 17 Aug $ 261.00
DEN
Denver
Frontier Airlines
DIRECT
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
DIRECT
DEN
Denver
Pick dates
25 Jul - 09 Aug $ 354.00
DEN
Denver
Frontier Airlines
DIRECT
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
DIRECT
DEN
Denver
Pick dates
24 Jul - 19 Aug $ 539.00
DEN
Denver
United Airlines
DIRECT
PHL
Philadelphia
PHL
Philadelphia
United Airlines
DIRECT
DEN
Denver
Pick dates

Last minute flights from Denver to Philadelphia

25 Jul - 31 Jul $ 366.00
DEN
Denver
Frontier Airlines
DIRECT
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
DIRECT
DEN
Denver
Pick dates
25 Jul - 31 Jul $ 366.00
DEN
Denver
Frontier Airlines
DIRECT
PHL
Philadelphia
PHL
Philadelphia
Frontier Airlines
DIRECT
DEN
Denver
Pick dates
25 Jul - 31 Jul $ 608.00
DEN
Denver
United Airlines
DIRECT
PHL
Philadelphia
PHL
Philadelphia
United Airlines
DIRECT
DEN
Denver
Pick dates

One-way flights to Philadelphia from Denver

6:05 AM - 6:05 AM
Frontier Airlines
0 Stops
3h 44m
DEN - PHL
$ 150
Kiwi
Pick dates
6:05 AM - 6:05 AM
Frontier Airlines
0 Stops
3h 44m
DEN - PHL
$ 154
Kiwi
Pick dates
11:59 PM - 11:59 PM
United Airlines
0 Stops
3h 32m
DEN - PHL
$ 230
Kiwi
Pick dates

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

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