$99 Cheap Frontier Airlines flights Denver (DEN) to Philadelphia (PHL)

View $99 flight on Sat, Jul 12, 2025Opens in a new window

$99 Cheap Frontier Airlines flights Denver (DEN) to Philadelphia (PHL)

Prices were available within the past 7 days and start at $99 for one-way flights and $154 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Frontier Airlines
Thu, Aug 21 - Fri, Aug 22
DEN
Denver
PHL
Philadelphia
$154
Roundtrip
Found 6 days ago
Select Frontier Airlines flight, departing Thu, Aug 21 from Denver to Philadelphia, returning Fri, Aug 22, priced at $154 Found 6 days ago
Frontier Airlines
Fri, Aug 22 - Sat, Aug 23
DEN
Denver
PHL
Philadelphia
$174
Roundtrip
Found 6 days ago
Select Frontier Airlines flight, departing Fri, Aug 22 from Denver to Philadelphia, returning Sat, Aug 23, priced at $174 Found 6 days ago
Frontier Airlines
Sat, Jul 12 - Sat, Jul 19
DEN
Denver
PHL
Philadelphia
$201
Roundtrip
Found 11 hours ago
Select Frontier Airlines flight, departing Sat, Jul 12 from Denver to Philadelphia, returning Sat, Jul 19, priced at $201 Found 11 hours ago
Frontier Airlines
Thu, Aug 21 - Sat, Aug 23
DEN
Denver
PHL
Philadelphia
$203
Roundtrip
Found 2 days ago
Select Frontier Airlines flight, departing Thu, Aug 21 from Denver to Philadelphia, returning Sat, Aug 23, priced at $203 Found 2 days ago
Frontier Airlines
Thu, Jul 10 - Fri, Jul 18
DEN
Denver
PHL
Philadelphia
$219
Roundtrip
Found 2 days ago
Select Frontier Airlines flight, departing Thu, Jul 10 from Denver to Philadelphia, returning Fri, Jul 18, priced at $219 Found 2 days ago
Frontier Airlines
Wed, Aug 20 - Fri, Aug 22
DEN
Denver
PHL
Philadelphia
$221
Roundtrip
Found 6 days ago
Select Frontier Airlines flight, departing Wed, Aug 20 from Denver to Philadelphia, returning Fri, Aug 22, priced at $221 Found 6 days ago
Flights from Denver (DEN) to Philadelphia (PHL)
Origin airport
Denver Intl.
Destination airport
Philadelphia Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, United
Popular airline
United
Distance
2485 km
Average flight time
5 hours 37 mins