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Cheap flights from Philadelphia to Denver from C$ 124

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 14/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
15 Oct — 22 Oct1
1 adult
1 adult, Economy

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

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 15 September 2025.

Round-trip from

C$ 246

One-way from

C$ 124

Popular in

December

Cheapest in

August

Average price

C$ 401
United Airlines
  • United Airlines
  • 15/10-25/10
  • Nonstop
  • 7h 43m total
  • Philadelphia to Denver
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United Airlines
  • United Airlines
  • 14/10
  • Nonstop
  • 4h 06m total
  • Philadelphia to Denver
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 13 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Philadelphia to Denver

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 15 September 2025.

Wed 15/108:00 a.m.PHL - DEN
Nonstop4h 06mUnited Airlines
Sat 18/1010:00 a.m.DEN - PHL
Nonstop3h 41mUnited Airlines
Deal found 15/9C$ 246
Tue 14/108:00 a.m.PHL - DEN
Nonstop4h 06mUnited Airlines
Tue 21/1010:20 a.m.DEN - PHL
Nonstop3h 40mUnited Airlines
Deal found 14/9C$ 268
Tue 21/1010:00 a.m.PHL - DEN
Nonstop4h 06mUnited Airlines
Fri 24/101:58 p.m.DEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 15/9C$ 274
Thu 30/1010:10 a.m.PHL - DEN
1 stop5h 25mSouthwest
Tue 4/1110:55 a.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 15/9C$ 282
Sat 15/113:40 p.m.PHL - DEN
Nonstop4h 15mSouthwest
Wed 19/118:10 a.m.DEN - PHL
1 stop7h 25mSouthwest
Deal found 15/9C$ 287
Tue 18/114:55 p.m.PHL - DEN
Nonstop4h 10mSouthwest
Wed 3/128:15 a.m.DEN - PHL
2 stops7h 20mSouthwest
Deal found 15/9C$ 294
Wed 15/108:00 a.m.PHL - DEN
Nonstop4h 06mUnited Airlines
Fri 17/105:32 p.m.DEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 15/9C$ 300
Wed 15/107:20 a.m.PHL - DEN
Nonstop4h 10mSouthwest
Wed 22/105:05 p.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 15/9C$ 301
Wed 8/108:00 a.m.PHL - DEN
Nonstop4h 06mUnited Airlines
Tue 21/105:32 p.m.DEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 15/9C$ 315
Tue 18/118:08 a.m.PHL - DEN
Nonstop4h 21mUnited Airlines
Tue 18/111:55 p.m.DEN - PHL
Nonstop3h 32mUnited Airlines
Deal found 15/9C$ 323
Fri 24/105:00 a.m.PHL - DEN
Nonstop4h 10mSouthwest
Mon 27/106:55 p.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 15/9C$ 327
Wed 3/126:35 a.m.PHL - DEN
Nonstop4h 10mSouthwest
Sun 7/126:20 p.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 15/9C$ 329

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 15 September 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

Wed 3/12

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

Nonstop4h 10m

Denver Intl

Wed 10/12

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

1 stop4h 50m

C$ 287

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 15/10

7:20 a.m.-9:30 a.m.

Nonstop4h 10m

Denver Intl

Wed 22/10

5:05 p.m.-10:30 p.m.

Nonstop3h 25m

C$ 301

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 3/12

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

Nonstop4h 10m

Denver Intl

Sun 7/12

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

Nonstop3h 30m

C$ 329

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 21/10

10:00 a.m.-12:06 p.m.

Nonstop4h 06m

Denver Intl

Tue 21/10

5:32 p.m.-11:09 p.m.

Nonstop3h 37m

C$ 330

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 21/10

10:00 a.m.-12:06 p.m.

Nonstop4h 06m

Denver Intl

Wed 22/10

5:32 p.m.-11:09 p.m.

Nonstop3h 37m

C$ 330

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 3/12

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

1 stop8h 32m

Denver Intl

Mon 8/12

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

1 stop7h 40m

C$ 338

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 2/12

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

1 stop8h 32m

Denver Intl

Wed 10/12

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

1 stop7h 40m

C$ 338

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 3/12

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

1 stop8h 32m

Denver Intl

Thu 11/12

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

1 stop7h 40m

C$ 338

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 4/12

7:18 p.m.-12:16 a.m.

1 stop6h 58m

Denver Intl

Mon 8/12

12:50 a.m.-9:26 a.m.

1 stop6h 36m

C$ 355

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 11/12

6:15 a.m.-12:54 p.m.

1 stop8h 39m

Denver Intl

Sun 14/12

6:20 p.m.-5:50 a.m.

1 stop9h 30m

C$ 355

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

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 12 September 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, August is the cheapest month in which you can book a flight from Philadelphia to Denver (average of C$ 320). Flying from Philadelphia to Denver in December is currently the most expensive (average of C$ 484). 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 15 September 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 at noon, which can drop the price by up to 66% versus a flight in the morning.

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 13 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 and United Airlines fly from Philadelphia to Denver in about 4h 06m. The time it takes to get you to your destination is usually consistent. Airlines will cover a distance of 2499 km. All flights are typically direct.

  • What are the cheapest airlines to fly from Philadelphia to Denver one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as C$ 130. Users have also found prices from C$ 166 and C$ 170 on United Airlines and JetBlue, respectively.

  • 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 (79%), Qatar Airways (77%) or United Airlines (77%) as they are the most reliable in getting you off to your destination on time.

  • 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, August is the cheapest month in which you can book a flight from Philadelphia to Denver (average of C$ 320). Flying from Philadelphia to Denver in December is currently the most expensive (average of C$ 484). 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

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

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

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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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