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Cheap flights from Philadelphia to Denver from C$ 133

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 17/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
25 Aug — 1 Sep1
1 adult

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

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 20 August 2025.

Round-trip from

C$ 264

One-way from

C$ 133

Popular in

December

Cheapest in

September

Average price

C$ 394

Good one-way deal

C$ 217 or less
Southwest
  • Southwest
  • 13/9-16/9
  • Nonstop
  • 7h 30m total
  • Philadelphia to Denver
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Southwest
  • Southwest
  • 17/9
  • Nonstop
  • 4h 00m total
  • Philadelphia to Denver
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Highest demand for flights based on searches. 4% potential increase in price (C$ 30 potential increase over avg. RT price).
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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 August 2025
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Price to beat on a one-way flight from Philadelphia to Denver Intl.
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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 20 August 2025.

Sat 13/97:35 a.m.PHL - DEN
Nonstop3h 55mSouthwest
Tue 16/910:25 a.m.DEN - PHL
Nonstop3h 35mSouthwest
Deal found 19/8C$ 264
Wed 17/912:15 p.m.PHL - DEN
Nonstop3h 55mSouthwest
Mon 22/95:30 p.m.DEN - PHL
Nonstop3h 35mSouthwest
Deal found 18/8C$ 275
Tue 23/98:15 a.m.PHL - DEN
1 stop6h 35mSouthwest
Sat 27/97:55 a.m.DEN - PHL
Nonstop3h 40mSouthwest
Deal found 19/8C$ 289
Tue 16/94:45 p.m.PHL - DEN
Nonstop4h 00mSouthwest
Sun 21/96:55 p.m.DEN - PHL
Nonstop3h 35mSouthwest
Deal found 18/8C$ 296
Mon 15/96:40 p.m.PHL - DEN
Nonstop4h 10mSouthwest
Wed 24/95:00 p.m.DEN - PHL
Nonstop3h 30mSouthwest
Deal found 18/8C$ 299
Tue 23/97:45 a.m.PHL - DEN
Nonstop3h 50mSouthwest
Sun 28/96:55 p.m.DEN - PHL
Nonstop3h 35mSouthwest
Deal found 19/8C$ 303
Wed 3/1212:05 p.m.PHL - DEN
1 stop6h 35mSouthwest
Wed 10/1210:55 a.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 18/8C$ 313
Wed 24/94:45 p.m.PHL - DEN
Nonstop4h 00mSouthwest
Sun 28/96:55 p.m.DEN - PHL
Nonstop3h 35mSouthwest
Deal found 19/8C$ 317
Mon 8/96:40 p.m.PHL - DEN
Nonstop4h 10mSouthwest
Wed 10/910:25 a.m.DEN - PHL
Nonstop3h 35mSouthwest
Deal found 18/8C$ 320
Thu 25/911:45 a.m.PHL - DEN
1 stop10h 50mSouthwest
Tue 30/95:00 p.m.DEN - PHL
Nonstop3h 30mSouthwest
Deal found 19/8C$ 321
Wed 10/97:45 a.m.PHL - DEN
Nonstop3h 50mSouthwest
Sun 21/96:55 p.m.DEN - PHL
Nonstop3h 35mSouthwest
Deal found 19/8C$ 324
Tue 4/116:35 a.m.PHL - DEN
Nonstop4h 10mSouthwest
Mon 10/117:40 a.m.DEN - PHL
1 stop5h 00mSouthwest
Deal found 19/8C$ 325

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 20 August 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

Tue 16/9

12:15 p.m.-2:10 p.m.

Nonstop3h 55m

Denver Intl

Wed 17/9

12:30 p.m.-6:05 p.m.

Nonstop3h 35m

C$ 264

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 13/9

7:35 a.m.-9:30 a.m.

Nonstop3h 55m

Denver Intl

Wed 17/9

12:30 p.m.-6:05 p.m.

Nonstop3h 35m

C$ 264

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 13/9

7:35 a.m.-9:30 a.m.

Nonstop3h 55m

Denver Intl

Tue 16/9

10:25 a.m.-4:00 p.m.

Nonstop3h 35m

C$ 264

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 19/9

8:00 a.m.-10:04 a.m.

Nonstop4h 04m

Denver Intl

Tue 23/9

1:45 p.m.-7:20 p.m.

Nonstop3h 35m

C$ 275

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 4/10

7:15 a.m.-9:25 a.m.

Nonstop4h 10m

Denver Intl

Mon 6/10

6:55 p.m.-12:20 a.m.

Nonstop3h 25m

C$ 275

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 16/10

5:00 a.m.-7:10 a.m.

Nonstop4h 10m

Denver Intl

Sat 18/10

5:40 p.m.-11:10 p.m.

Nonstop3h 30m

C$ 275

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 7/10

4:45 p.m.-6:55 p.m.

Nonstop4h 10m

Denver Intl

Mon 13/10

6:55 p.m.-12:20 a.m.

Nonstop3h 25m

C$ 275

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 26/9

6:40 p.m.-8:50 p.m.

Nonstop4h 10m

Denver Intl

Tue 30/9

5:00 p.m.-10:30 p.m.

Nonstop3h 30m

C$ 275

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 31/10

8:30 a.m.-10:40 a.m.

Nonstop4h 10m

Denver Intl

Sat 1/11

5:40 p.m.-11:10 p.m.

Nonstop3h 30m

C$ 275

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 31/10

8:30 a.m.-10:40 a.m.

Nonstop4h 10m

Denver Intl

Tue 4/11

5:15 p.m.-10:35 p.m.

Nonstop3h 20m

C$ 275

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/8

Showing 1-10 of 20 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 8 August 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 20 August 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 12 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 fly from Philadelphia to Denver in about 3h 55m. 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 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 Qatar Airways (81%), United Airlines (80%) or Air Canada (77%) 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$ 254, our data shows the cheapest flight currently is C$ 168. When looking at the most popular route, (Philadelphia - Denver Intl), you can expect to pay C$ 535 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, 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

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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?

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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