$127 Cheap Frontier Airlines flights Denver (DEN) to Philadelphia (PHL)

View $127 flight on Wed, Oct 29, 2025Opens in a new window

$127 Cheap Frontier Airlines flights Denver (DEN) to Philadelphia (PHL)

Prices were available within the past 7 days and start at $127 for one-way flights and $141 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, Nov 5 - Sat, Nov 8
DEN
Denver
PHL
Philadelphia
$141 Roundtrip, found 12 hours ago
$141
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Wed, Nov 5 from Denver to Philadelphia, returning Sat, Nov 8, priced at $141 found 12 hours ago
Frontier Airlines
Wed, Oct 22 - Sat, Oct 25
DEN
Denver
PHL
Philadelphia
$163 Roundtrip, found 15 hours ago
$163
Roundtrip
found 15 hours ago
Select Frontier Airlines flight, departing Wed, Oct 22 from Denver to Philadelphia, returning Sat, Oct 25, priced at $163 found 15 hours ago
Frontier Airlines
Wed, Oct 29 - Sat, Nov 1
DEN
Denver
PHL
Philadelphia
$168 Roundtrip, found 21 hours ago
$168
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Wed, Oct 29 from Denver to Philadelphia, returning Sat, Nov 1, priced at $168 found 21 hours ago
Frontier Airlines
Wed, Oct 8 - Sat, Oct 25
DEN
Denver
PHL
Philadelphia
$172 Roundtrip, found 1 day ago
$172
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Oct 8 from Denver to Philadelphia, returning Sat, Oct 25, priced at $172 found 1 day ago
Frontier Airlines
Thu, Sep 18 - Fri, Oct 3
DEN
Denver
PHL
Philadelphia
$178 Roundtrip, found 20 hours ago
$178
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Thu, Sep 18 from Denver to Philadelphia, returning Fri, Oct 3, priced at $178 found 20 hours ago
Frontier Airlines
Wed, Aug 27 - Sat, Aug 30
DEN
Denver
PHL
Philadelphia
$181 Roundtrip, found 21 hours ago
$181
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Wed, Aug 27 from Denver to Philadelphia, returning Sat, Aug 30, priced at $181 found 21 hours ago
Flights from Denver (DEN) to Philadelphia (PHL)
Origin airport
Denver Intl.
Destination airport
Philadelphia Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, Sun Country Airlines, United
Popular airline
Frontier Airlines
Distance
1553 mi
Average flight time
5 hours 35 mins

Frequently asked questions

How much is a Frontier Airlines flight from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
Scoring cheap one-way Frontier Airlines flights from DEN to PHL from $127 on Expedia is easy — just filter by "Price (lowest to highest)." Or check out our affordable round-trip fares from $141 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from DEN to PHL with Frontier Airlines?
Frontier Airlines flights to Philadelphia are typically more affordable in the off-peak months of January and February. Whether you need a round-trip or one-way ticket, you could find a better deal then.
What is the cheapest time to book flights from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL) with Frontier Airlines?
Search for cheap Frontier Airlines flights from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL) one to three months ahead of your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare class and journey, the best day to book a domestic flight is generally Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Frontier Airlines fly nonstop from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
Take off on one of Frontier Airlines's 2 weekly direct flights from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL). To see what's available, enter your dates, origin and destination and hit search. Next, apply the "Nonstop" and "Airline" filters.
How long does it take to fly from DEN to PHL with Frontier Airlines?
Depart Denver Intl. Airport (DEN) for Philadelphia Intl. Airport (PHL) on a nonstop Frontier Airlines flight, and you'll be in the skies for approximately 3h 29m.
What is the earliest Frontier Airlines flight from DEN to PHL?
Taking off from DEN at 3:19PM UTC-7, the earliest Frontier Airlines flight to PHL lands at 8:48PM UTC-5. Flying early means you'll be less likely to experience cancellations.* Don't like early starts? The last Frontier Airlines flight from DEN to PHL departs at 3:19PM UTC-7 and touches down at 8:48PM UTC-5.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Frontier Airlines fly into in Philadelphia?
Take a Frontier Airlines flight from Denver Intl. Airport (DEN) to Philadelphia, and you'll likely touch down at Philadelphia Intl. Airport (PHL). This is the airline's main hub in this destination.
Why fly with Frontier Airlines from DEN to PHL?
Fly from DEN to PHL with Frontier Airlines and look forward to a range of perks starting with a rewarding loyalty program. When you book through Expedia as a Frontier Miles and One Key™ member, you may also earn OneKeyCash™* to spend on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does Frontier Airlines fly from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
You'll likely be on an Airbus A321neo or an Airbus A320neo when flying Frontier Airlines from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL). However, keep in mind that a different aircraft could be assigned to your route due to operational requirements.
Can I change or cancel my Frontier Airlines flight from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
You can usually reschedule or cancel your flight, although additional fees may apply if you booked more than 24 hours ago. Want to keep your options open? Make use of our "Changes included" or "No cancel fee" filter to find flights that won't charge you extra if you have to revise your plans. To make modifications, visit "Trips," select your flight and click on "Manage Booking" for more information.

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*Available to One Key members.