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

View AU$135 flight on Sat, 25 Oct. 2025Opens in a new window

Popular airlines from Philadelphia International Airport (PHL) to Denver International Airport (DEN)

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, 25 Oct. - Wed, 29 Oct.
PHL
Philadelphia
DEN
Denver
AU$268 Return, found 1 day ago
AU$268
Return
found 1 day ago
Select American Airlines flight, departing Sat, 25 Oct. from Philadelphia to Denver, returning Wed, 29 Oct., priced at AU$268 found 1 day ago
American Airlines
Fri, 5 Dec. - Thu, 11 Dec.
PHL
Philadelphia
DEN
Denver
AU$300 Return, found 2 days ago
AU$300
Return
found 2 days ago
Select American Airlines flight, departing Fri, 5 Dec. from Philadelphia to Denver, returning Thu, 11 Dec., priced at AU$300 found 2 days ago
American Airlines
Wed, 3 Dec. - Wed, 10 Dec.
PHL
Philadelphia
DEN
Denver
AU$313 Return, found 6 days ago
AU$313
Return
found 6 days ago
Select American Airlines flight, departing Wed, 3 Dec. from Philadelphia to Denver, returning Wed, 10 Dec., priced at AU$313 found 6 days ago
American Airlines
Sat, 25 Oct. - Wed, 29 Oct.
PHL
Philadelphia
DEN
Denver
AU$325 Return, found 1 day ago
AU$325
Return
found 1 day ago
Select American Airlines flight, departing Sat, 25 Oct. from Philadelphia to Denver, returning Wed, 29 Oct., priced at AU$325 found 1 day ago
American Airlines
Thu, 4 Dec. - Thu, 11 Dec.
PHL
Philadelphia
DEN
Denver
AU$357 Return, found 2 days ago
AU$357
Return
found 2 days ago
Select American Airlines flight, departing Thu, 4 Dec. from Philadelphia to Denver, returning Thu, 11 Dec., priced at AU$357 found 2 days ago
American Airlines
Mon, 13 Oct. - Fri, 24 Oct.
PHL
Philadelphia
DEN
Denver
AU$375 Return, found 2 days ago
AU$375
Return
found 2 days ago
Select American Airlines flight, departing Mon, 13 Oct. from Philadelphia to Denver, returning Fri, 24 Oct., priced at AU$375 found 2 days ago
American Airlines
Fri, 5 Dec. - Thu, 11 Dec.
PHL
Philadelphia
DEN
Denver
AU$378 Return, found 2 days ago
AU$378
Return
found 2 days ago
Select American Airlines flight, departing Fri, 5 Dec. from Philadelphia to Denver, returning Thu, 11 Dec., priced at AU$378 found 2 days ago
United
Sat, 25 Oct. - Wed, 29 Oct.
PHL
Philadelphia
DEN
Denver
AU$392 Return, found 1 day ago
AU$392
Return
found 1 day ago
Select United flight, departing Sat, 25 Oct. from Philadelphia to Denver, returning Wed, 29 Oct., priced at AU$392 found 1 day ago
Delta
Sat, 25 Oct. - Wed, 29 Oct.
PHL
Philadelphia
DEN
Denver
AU$395 Return, found 1 day ago
AU$395
Return
found 1 day ago
Select Delta flight, departing Sat, 25 Oct. from Philadelphia to Denver, returning Wed, 29 Oct., priced at AU$395 found 1 day ago
Alaska Airlines
Sat, 25 Oct. - Wed, 29 Oct.
PHL
Philadelphia
DEN
Denver
AU$670 Return, found 1 day ago
AU$670
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 25 Oct. from Philadelphia to Denver, returning Wed, 29 Oct., priced at AU$670 found 1 day ago

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

March is typically the cheapest month to fly

From AU$138 - AU$733 per traveller.

Graph displaying average flight prices per month

Flight from Philadelphia to Denver route information
Origin airport
Philadelphia Intl.
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Return price
AU$268
Distance
2485 km
Average flight time
2 hours 7 mins

Your quick guide to flights from Philadelphia to Denver

Pick up great flights from Philadelphia to Denver

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Philadelphia to Denver. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Philadelphia to Denver that take around hours.

Find cheap flights from Philadelphia to Denver

From the great flight deals with prices currently ranging from AU$268 to AU$670, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Philadelphia to Denver around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Denver is normally in October.

Reasons to book your flight from Philadelphia to Denver with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Philadelphia to Denver across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Denver right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from PHL to Denver Intl. Airport (DEN)?
The lowest price advertised for a round-trip flight between Philadelphia Intl. Airport (PHL) and DIA airport is AU$268. But you better act soon. This price is taken from fares offered within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from PHL to DIA airport?
Every air carrier has its own terms and conditions. If you decide to cancel your holiday, visit our Customer Service Portal.
How do I find cheap flights from Philadelphia Intl. Airport (PHL) to DIA airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for PHL to DIA airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from PHL to Denver Airport?
The flying distance between Philadelphia Airport and DEN is 2 500 kilometres. Listen to some music or bury your nose in a book and the journey will zip by.
Which airlines fly direct from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
With a good range of airlines to pick from, you should be able to find the perfect flight from Philadelphia Airport to Denver Airport in just a few easy clicks. Here's a list of the top carriers with services between these airports:

  • United Airlines - (UA) with 60 monthly flights
  • Frontier Airlines - (F9) with 47 monthly flights
  • American Airlines - (AA) with 39 monthly flights
  • Southwest Airlines - (WN) with 30 monthly flights

Are Philadelphia Intl. Airport (PHL) to Denver Airport flight tickets cheaper when they're purchased at the last minute?
Flight prices fluctuate, so there are no guarantees. While last-minute deals between Philadelphia Airport and Denver Intl. Airport (DEN) are of course possible, it's also a good idea to monitor prices well before you fly. In fact, some air carriers publish their prices up to 12 months prior to the departure date. Expedia is continuously updating the biggest bargains around, so keep checking back and be ready to grab your seat when prices drop.

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