$54 Cheap Flights from Denver (DEN) to Philadelphia (PHL)

View $54 flight on Wed, Sep 17, 2025Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)

Cheap Flights from Denver to Philadelphia (DEN-PHL)

Prices were available within the past 7 days and start at $54 for one-way flights and $105 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Oct 30 - Fri, Oct 31
DEN
Denver
PHL
Philadelphia
$105 Roundtrip, found 8 hours ago
$105
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Denver to Philadelphia, returning Fri, Oct 31, priced at $105 found 8 hours ago
Frontier Airlines
Wed, Sep 24 - Sat, Sep 27
DEN
Denver
PHL
Philadelphia
$108 Roundtrip, found 1 hour ago
$108
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, Sep 24 from Denver to Philadelphia, returning Sat, Sep 27, priced at $108 found 1 hour ago
Frontier Airlines
Thu, Oct 30 - Fri, Nov 7
DEN
Denver
PHL
Philadelphia
$110 Roundtrip, found 13 hours ago
$110
Roundtrip
found 13 hours ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Denver to Philadelphia, returning Fri, Nov 7, priced at $110 found 13 hours ago
Frontier Airlines
Fri, Sep 5 - Sat, Sep 13
DEN
Denver
PHL
Philadelphia
$112 Roundtrip, just found
$112
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Sep 5 from Denver to Philadelphia, returning Sat, Sep 13, priced at $112 just found
Frontier Airlines
Thu, Nov 13 - Sat, Nov 15
DEN
Denver
PHL
Philadelphia
$115 Roundtrip, found 6 hours ago
$115
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Denver to Philadelphia, returning Sat, Nov 15, priced at $115 found 6 hours ago
Frontier Airlines
Fri, Sep 5 - Mon, Sep 15
DEN
Denver
PHL
Philadelphia
$115 Roundtrip, just found
$115
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Sep 5 from Denver to Philadelphia, returning Mon, Sep 15, priced at $115 just found
Southwest Airlines
Wed, Nov 5 - Tue, Nov 11
DEN
Denver
PHL
Philadelphia
$161 Roundtrip, found 1 hour ago
$161
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Wed, Nov 5 from Denver to Philadelphia, returning Tue, Nov 11, priced at $161 found 1 hour ago
United
Tue, Oct 21 - Wed, Oct 29
DEN
Denver
PHL
Philadelphia
$161 Roundtrip, just found
$161
Roundtrip
just found
Select United flight, departing Tue, Oct 21 from Denver to Philadelphia, returning Wed, Oct 29, priced at $161 just found
JetBlue Airways
Mon, Oct 20 - Sat, Oct 25
DEN
Denver
PHL
Philadelphia
$229 Roundtrip, found 23 hours ago
$229
Roundtrip
found 23 hours ago
Select JetBlue Airways flight, departing Mon, Oct 20 from Denver to Philadelphia, returning Sat, Oct 25, priced at $229 found 23 hours ago
Delta
Mon, Nov 17 - Tue, Nov 18
DEN
Denver
PHL
Philadelphia
$251 Roundtrip, found 8 hours ago
$251
Roundtrip
found 8 hours ago
Select Delta flight, departing Mon, Nov 17 from Denver to Philadelphia, returning Tue, Nov 18, priced at $251 found 8 hours ago

Find the cheapest month to fly from Denver (DEN) to Philadelphia (PHL)

March is typically the cheapest month to fly

From $93 - $471 per traveler.

Graph displaying average flight prices per month

Alternative airports near Philadelphia

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to New Castle ILG. Average driving time to city center is 44 minutes. Flights from $305
ILG
New Castle
Average driving time to city center44 min
Flights from $305
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
Roundtrip price
$104
Distance
1553 mi
Average flight time
5 hours 38 mins

Denver to Philadelphia Flights

The cheapest times to fly from Denver to Philadelphia

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Denver to Philadelphia are during the month of October. You can find some of the cheapest flights from Denver to Philadelphia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Denver to Philadelphia

Sunday is one of the best days to book for cheap flights from Denver to Philadelphia: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Denver to Philadelphia

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Denver to Philadelphia in 2025. You can also book with separate airlines for your outbound and return journeys, from $54 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Denver to Philadelphia flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Denver to Philadelphia airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL) cost?
Grab a cheap one-way flight from $54 or cheap return flight from $105 from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
Planning your trip for October may help you find better deals, as it's the cheapest month for flights between DEN and PHL. You'll typically find the lowest prices during off-peak months.
Which airlines fly direct from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
You can pick from 4 carriers that fly direct from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL). Including:

  • United Airlines
  • American Airlines
  • Southwest Airlines

What is the cheapest airline that flies from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
Frontier Airlines and Southwest Airlines are some well-known airlines offering reasonable fares. Remember that flight prices from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL) can change depending on demand, travel dates and how early you book. With Expedia's search tool, you can easily find a DEN to PHL flight that fits your preferences and budget.
How many flights per day from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
With, on average, 6 direct flights departing from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL) each day, you'll be soaring through the skies in no time.
What are the most popular departure times for flights from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
More people fly between DEN and PHL at 5 PM than at any other time of day. Prefer a quieter experience? Consider flying outside peak hours and it's possible you'll save on your fare as well.
What day of the week has the most flights from DEN to PHL?
Depart on a Sunday if you're after the best choice of flights from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL).
What is the earliest flight from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
Hop on the earliest flight at around 6:37AM UTC-7, departing from Denver Intl. Airport (DEN). You'll be traveling for around 3h 49m, arriving at Philadelphia Intl. Airport (PHL) at approximately 12:26PM UTC-5.
How long does it take to fly from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
It takes approximately 3 hours and 35 minutes to travel the 1,550 mi from DEN to PHL.
What airline has the least delays from DEN to PHL?
American Airlines has the best performance for on-time direct flights from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL), with an on-time score of 84%. Use the Expedia App to see your flight status before you head off and get real-time alerts about any trip changes.
What is the best time to fly from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
To reach Philadelphia Intl. Airport (PHL) on time, pick a flight that leaves Denver Intl. Airport (DEN) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Philadelphia from Denver Intl. Airport (DEN)?
Philadelphia Intl. Airport (PHL) is the only airport in Philadelphia with direct flights from Denver Intl. Airport (DEN). Browse the available options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL) last-minute?
Last-minute fares from DEN to PHL are typically more expensive. To lock in the lowest prices, start searching for flights as early as possible. That said, if you're flexible with your travel plans, it's possible to land a cheap fare right before you leave.
Is it cheaper to book a DEN to PHL flight and hotel package?
You'll typically save money by securing a DEN to PHL flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've chosen your ideal flights and accommodations, you can add extras such as tours, car rentals and activities.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)?
Typically, you can cancel or reschedule your DEN to PHL flight. However, there may be additional fees, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you need more details, go to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.