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

View $54 flight on Sat, May 10, 2025Opens in a new window
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Cheap Flights from Philadelphia to Denver (PHL-DEN)

Prices were available within the past 7 days and start at $54 for one-way flights and $157 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, May 9 - Sat, May 10
PHL
Philadelphia
DEN
Denver
$157 Roundtrip, found 4 hours ago
$157
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Fri, May 9 from Philadelphia to Denver, returning Sat, May 10, priced at $157 found 4 hours ago
Frontier Airlines
Sat, May 10 - Mon, May 19
PHL
Philadelphia
DEN
Denver
$165 Roundtrip, found 1 hour ago
$165
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sat, May 10 from Philadelphia to Denver, returning Mon, May 19, priced at $165 found 1 hour ago
Frontier Airlines
Sat, May 10 - Tue, May 20
PHL
Philadelphia
DEN
Denver
$183 Roundtrip, found 1 hour ago
$183
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sat, May 10 from Philadelphia to Denver, returning Tue, May 20, priced at $183 found 1 hour ago
Frontier Airlines
Sat, May 31 - Tue, Jun 3
PHL
Philadelphia
DEN
Denver
$184 Roundtrip, found 1 hour ago
$184
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sat, May 31 from Philadelphia to Denver, returning Tue, Jun 3, priced at $184 found 1 hour ago
Frontier Airlines
Wed, Jul 9 - Sat, Jul 19
PHL
Philadelphia
DEN
Denver
$189 Roundtrip, found 1 hour ago
$189
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, Jul 9 from Philadelphia to Denver, returning Sat, Jul 19, priced at $189 found 1 hour ago
Frontier Airlines
Sat, May 10 - Sat, May 17
PHL
Philadelphia
DEN
Denver
$189 Roundtrip, found 3 hours ago
$189
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Sat, May 10 from Philadelphia to Denver, returning Sat, May 17, priced at $189 found 3 hours ago
United
Tue, Jun 3 - Wed, Jun 11
PHL
Philadelphia
DEN
Denver
$193 Roundtrip, found 6 hours ago
$193
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Jun 3 from Philadelphia to Denver, returning Wed, Jun 11, priced at $193 found 6 hours ago
American Airlines
Tue, May 27 - Wed, Jun 4
PHL
Philadelphia
DEN
Denver
$196 Roundtrip, found 6 hours ago
$196
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Tue, May 27 from Philadelphia to Denver, returning Wed, Jun 4, priced at $196 found 6 hours ago
Southwest Airlines
Sun, May 25 - Wed, Jun 4
PHL
Philadelphia
DEN
Denver
$204 Roundtrip, found 1 hour ago
$204
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Sun, May 25 from Philadelphia to Denver, returning Wed, Jun 4, priced at $204 found 1 hour ago
JetBlue Airways
Sat, Jun 7 - Tue, Jun 17
PHL
Philadelphia
DEN
Denver
$229 Roundtrip, found 1 hour ago
$229
Roundtrip
found 1 hour ago
Select JetBlue Airways flight, departing Sat, Jun 7 from Philadelphia to Denver, returning Tue, Jun 17, priced at $229 found 1 hour ago

Frequently asked questions

How much does a flight from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN) cost?
Cheap return fares from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN) start at $161. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines flight leaving PHL on May 13 2025 and touching down at DEN. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from PHL to DEN?
The cheapest flights from PHL to DEN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
Take your pick of 4 airlines that fly direct from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN). These include:

  • United Airlines
  • American Airlines
  • Southwest Airlines

What is the cheapest airline that flies from PHL to DEN?
At the moment, the cheapest airline operating one-way flights from PHL to DEN is Southwest Airlines. You can book a seat on this route from $81. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from PHL on May 13 2025. Prices were last updated on April 24 2025 and have not changed since.
How many flights per day from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
When departing from Philadelphia Intl. Airport (PHL), you’ll have your pick from an average of 6 daily nonstop flights to Denver Intl. Airport (DEN).
What are the most popular departure times for flights from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
The 8 AM departures from PHL to DEN are the top choice for many travelers. They can also be more expensive. If you’re looking to save, book during off-peak hours.
What day of the week has the most flights from PHL to DEN?
Thursday has the most flights from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN). Consider taking off on this day and you’ll have a greater chance of finding a departure that fits your schedule.
What is the earliest flight from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
The first flight of the day out of Philadelphia Intl. Airport (PHL) is at around 8:10AM UTC-5. Board this plane and you’ll touch down at Denver Intl. Airport (DEN) at approximately 10:32AM UTC-7. The overall travel time is 4h 22m.
How long does it take to fly from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
Flights from PHL to DEN have an average travel time of 4 hours and 21 minutes. The total distance between the two is 1,550 mi.
What airline has the least delays from PHL to DEN?
Consider traveling with United Airlines if you’d like to fly straight from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN) without any interruptions. This airline has the best track record for punctuality, with an on-time score of 90%. Want to get notified of any changes? You can keep an eye on your flight status using the Expedia App.
What is the best time to fly from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
Book a flight from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures after this hour are on average 22% more likely to be canceled.**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 Denver from Philadelphia Intl. Airport (PHL)?
Explore your flight options from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN). This is the only airport in Denver you can land at if you’re taking a direct flight.
Is it cheaper to buy a plane ticket from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN) last-minute?
Booking your flight from PHL to DEN just before your trip is generally more expensive. But if you’re flexible with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a PHL to DEN flight and hotel package?
Securing a PHL to DEN flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Choose from our wide range of stays and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
In most cases, you can cancel or reschedule your PHL to DEN flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline’s fees and rules on flight changes, or if you want further information, go to our Customer Service portal.
*Available to One Key members.