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Cheap flights from Philadelphia to Denver from C$ 126

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 31/12. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
16 Nov — 23 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Philadelphia to Denver Intl are usually found in August or July, booked 40 days in advance, depart on a Friday or Wednesday and return on a Tuesday

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Cheapest flights from Philadelphia to Denver
Explore the most affordable flight options available from Philadelphia to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.

Sat 8/113:40 p.m.PHL - DEN
Nonstop4h 15mSouthwest
Wed 12/115:15 p.m.DEN - PHL
Nonstop3h 20mSouthwest
Deal found 16/10C$ 251
Wed 29/107:20 a.m.PHL - DEN
Nonstop4h 10mSouthwest
Fri 31/105:15 p.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 15/10C$ 272
Sat 15/113:40 p.m.PHL - DEN
Nonstop4h 15mSouthwest
Mon 17/115:15 p.m.DEN - PHL
Nonstop3h 20mSouthwest
Deal found 15/10C$ 278
Thu 4/122:45 p.m.PHL - DEN
1 stop7h 05mSouthwest
Tue 9/1210:55 a.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 15/10C$ 292
Thu 13/113:48 p.m.PHL - DEN
Nonstop4h 20mUnited Airlines
Sat 15/115:37 p.m.DEN - PHL
Nonstop3h 32mUnited Airlines
Deal found 15/10C$ 293
Mon 8/124:55 p.m.PHL - DEN
Nonstop4h 10mSouthwest
Thu 25/128:00 a.m.DEN - PHL
2 stops7h 15mSouthwest
Deal found 15/10C$ 299
Wed 12/116:35 a.m.PHL - DEN
Nonstop4h 10mSouthwest
Sat 15/111:25 p.m.DEN - PHL
1 stop5h 10mSouthwest
Deal found 15/10C$ 306
Fri 7/117:00 a.m.PHL - DEN
Nonstop4h 10mSouthwest
Tue 11/115:15 p.m.DEN - PHL
Nonstop3h 20mSouthwest
Deal found 15/10C$ 308
Wed 5/119:45 a.m.PHL - DEN
Nonstop4h 22mUnited Airlines
Sun 9/115:37 p.m.DEN - PHL
Nonstop3h 32mUnited Airlines
Deal found 15/10C$ 320
Sat 8/1112:23 p.m.PHL - DEN
1 stop7h 05mDelta
Mon 10/1112:50 a.m.DEN - PHL
1 stop6h 30mDelta
Deal found 16/10C$ 333
Wed 5/111:50 p.m.PHL - DEN
1 stop6h 10mSouthwest
Sat 8/119:35 a.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 14/10C$ 334

Cheap flight deals from Philadelphia to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 October 2025.

Round-trip from

C$ 251

One-way from

C$ 126

Popular in

December

Cheapest in

August

Average price

C$ 420

Good round-trip deal

C$ 243 or less
United Airlines
  • United Airlines
  • 5/11-11/11
  • Nonstop
  • 7h 54m total
  • Philadelphia to Denver
Search Deals
Southwest
  • Southwest
  • 17/1
  • 1 total stop
  • 6h 20m total
  • Philadelphia to Denver
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Philadelphia to Denver Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 17 October 2025.
Use the filters below to find and compare flights from Philadelphia to Denver that are best for you.

Fly from

Philadelphia

Fly to

Denver

Route

Depart

Return

Price

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 4/12

2:45 p.m.-7:50 p.m.

1 stop7h 05m

Denver Intl

Tue 9/12

10:55 a.m.-4:20 p.m.

Nonstop3h 25m

C$ 292

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 14/11

3:48 p.m.-6:08 p.m.

Nonstop4h 20m

Denver Intl

Tue 18/11

1:55 p.m.-7:27 p.m.

Nonstop3h 32m

C$ 293

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 16/1

5:05 p.m.-10:25 p.m.

1 stop7h 20m

Denver Intl

Tue 20/1

9:10 a.m.-5:25 p.m.

1 stop6h 15m

C$ 320

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 3/12

4:32 p.m.-11:04 p.m.

1 stop8h 32m

Denver Intl

Sun 7/12

11:59 p.m.-9:39 a.m.

1 stop7h 40m

C$ 344

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 10/3

4:48 p.m.-11:04 p.m.

1 stop8h 16m

Denver Intl

Wed 11/3

1:46 p.m.-12:13 a.m.

1 stop8h 27m

C$ 344

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 6/11

6:35 p.m.-8:45 p.m.

Nonstop4h 10m

Denver Intl

Sun 9/11

9:55 a.m.-3:25 p.m.

Nonstop3h 30m

C$ 376

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 16/12

6:35 a.m.-8:45 a.m.

Nonstop4h 10m

Denver Intl

Sat 20/12

7:55 p.m.-1:20 a.m.

Nonstop3h 25m

C$ 381

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 19/11

8:08 a.m.-10:29 a.m.

Nonstop4h 21m

Denver Intl

Tue 2/12

5:50 p.m.-11:22 p.m.

Nonstop3h 32m

C$ 385

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 24/12

4:00 p.m.-7:40 p.m.

1 stop5h 40m

Denver Intl

Wed 31/12

8:15 a.m.-3:05 p.m.

1 stop4h 50m

C$ 390

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 15/1

5:50 p.m.-11:41 p.m.

1 stop7h 51m

Denver Intl

Tue 20/1

10:15 a.m.-3:50 p.m.

Nonstop3h 35m

C$ 395

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/10

Showing 1-10 of 22 results
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Best time to book a flight from Philadelphia to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to Denver

How far ahead should I book a flight from Philadelphia to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Denver. Price data was last updated on 10 October 2025.

To ensure you get the cheapest price possible for a flight from Philadelphia to Denver, you should look to book at least 40 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Philadelphia to Denver?

Currently, November is the cheapest month in which you can book a flight from Philadelphia to Denver (average of C$ 138). Flying from Philadelphia to Denver in May is currently the most expensive (average of C$ 201). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to DEN?

Find hourly flight availability from Philadelphia to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 October 2025.

When flying from Philadelphia to Denver, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 70% versus a flight in the afternoon.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Philadelphia to Denver flight route?

    This flight path from Philadelphia to Denver Intl was viewed by 8 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Philadelphia to Denver?

    Airlines like Southwest, United Airlines, and Delta fly from Philadelphia to Denver in about 4h 20m. The time it takes to get you to your destination can typically vary by up to 4h 10m. Airlines will cover a distance of 2499 km. This flight may include one or multiple stops.

  • What are the most reliable airlines from Philadelphia to Denver?

    No one likes to see their flight delayed. When booking a flight from Philadelphia to Denver consider choosing Air Canada (90%), Aer Lingus (88%) or United Airlines (82%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Philadelphia to Denver?

    While on average a flight from Philadelphia to Denver is generally C$ 539, our data shows the cheapest flight currently is C$ 243. When looking at the most popular route, (Philadelphia - Denver Intl), you can expect to pay C$ 511 for that flight.

  • Can I find deals for flights from Philadelphia to Denver that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Denver.

  • Can I find deals for business class flights from Philadelphia to Denver?

    Yes. Cheapflights offers flight deals from Philadelphia to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to Denver?

    Currently, November is the cheapest month in which you can book a flight from Philadelphia to Denver (average of C$ 138). Flying from Philadelphia to Denver in May is currently the most expensive (average of C$ 201). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Golden
Westminster
Thornton

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Philadelphia to Denver

See prices for flight routes from nearby airports that may be better suited for you.
Reagan-National to Denver flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Philadelphia to Denver?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Philadelphia to Denver. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Philadelphia to Denver?

Millions of users choose and trust Cheapflights to book the best flight deals from Philadelphia to Denver for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Philadelphia to Denver with no change fees?

Yes! Cheapflights helps users easily find flights from Philadelphia to Denver with no change fees.

Can Cheapflights notify me if prices for flights from Philadelphia to Denver become cheaper?

Yes! Start tracking prices for Philadelphia to Denver flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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