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Cheap flights from Philadelphia to Denver from C$ 135

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 25/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
24 Mar — 31 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Philadelphia to Denver Intl are usually found in July or August, booked 32 days in advance, depart on a Tuesday or Thursday and return on a Monday

Cheap flight deals from Philadelphia to Denver

Enter your travel dates to find the best prices.

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 22 February 2026.

Tue 21/44:00 p.m.
PHL
-
DEN
Nonstop4h 10m
Southwest
Tue 5/56:10 p.m.
DEN
-
PHL
Nonstop3h 45m
Southwest
Deal found 19/2C$ 269
Fri 1/53:34 p.m.
PHL
-
DEN
Nonstop4h 21m
United Airlines
Wed 6/55:59 p.m.
DEN
-
PHL
Nonstop3h 44m
United Airlines
Deal found 19/2C$ 297
Tue 24/33:30 p.m.
PHL
-
DEN
Nonstop4h 30m
United Airlines
Tue 31/310:05 a.m.
DEN
-
PHL
Nonstop3h 42m
United Airlines
Deal found 18/2C$ 300
Wed 8/45:50 a.m.
PHL
-
DEN
Nonstop4h 05m
Southwest
Fri 17/47:05 p.m.
DEN
-
PHL
Nonstop3h 30m
Southwest
Deal found 19/2C$ 312
Tue 24/35:30 a.m.
PHL
-
DEN
Nonstop4h 10m
Southwest
Tue 31/36:30 p.m.
DEN
-
PHL
Nonstop3h 20m
Southwest
Deal found 18/2C$ 313
Fri 19/69:12 a.m.
PHL
-
DEN
1 stop9h 45m
JetBlue
Sun 28/611:15 p.m.
DEN
-
PHL
1 stop7h 04m
JetBlue
Deal found 19/2C$ 316
Tue 17/33:30 p.m.
PHL
-
DEN
Nonstop4h 30m
United Airlines
Sat 21/33:10 p.m.
DEN
-
PHL
1 stop7h 06m
United Airlines
Deal found 22/2C$ 319
Wed 25/35:30 a.m.
PHL
-
DEN
Nonstop4h 10m
Southwest
Sat 28/37:00 p.m.
DEN
-
PHL
Nonstop3h 20m
Southwest
Deal found 21/2C$ 320
Fri 24/41:35 p.m.
PHL
-
DEN
Nonstop4h 05m
Southwest
Mon 27/47:05 p.m.
DEN
-
PHL
Nonstop3h 30m
Southwest
Deal found 19/2C$ 324
Tue 7/46:00 a.m.
PHL
-
DEN
1 stop6h 32m
Delta
Tue 21/412:35 a.m.
DEN
-
PHL
1 stop6h 20m
Delta
Deal found 20/2C$ 326
Wed 1/47:36 p.m.
PHL
-
DEN
1 stop6h 33m
Delta
Mon 6/412:35 a.m.
DEN
-
PHL
1 stop6h 11m
Delta
Deal found 20/2C$ 327
Sat 14/35:05 p.m.
PHL
-
DEN
Nonstop4h 20m
Southwest
Tue 17/36:30 p.m.
DEN
-
PHL
Nonstop3h 20m
Southwest
Deal found 22/2C$ 334

Find 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 22 February 2026.

Round-trip from

C$ 269

One-way from

C$ 135

Popular in

December

Cheapest in

July

Average price

C$ 451
Southwest
  • Southwest
  • 21/4-5/5
  • Nonstop
  • 7h 55m total
  • Philadelphia to Denver
Search Deals
Southwest
  • Southwest
  • 20/5
  • Nonstop
  • 4h 05m total
  • Philadelphia to Denver
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 48 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).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 22 February 2026.
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 24/3

5:30 a.m.-7:40 a.m.

Nonstop4h 10m

Denver Intl

Tue 31/3

6:30 p.m.-11:50 p.m.

Nonstop3h 20m

C$ 313

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 18/3

5:30 a.m.-7:40 a.m.

Nonstop4h 10m

Denver Intl

Wed 25/3

6:00 a.m.-6:30 p.m.

1 stop10h 30m

C$ 349

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 31/3

4:55 p.m.-10:05 p.m.

1 stop7h 10m

Denver Intl

Wed 8/4

5:59 p.m.-11:43 p.m.

Nonstop3h 44m

C$ 353

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 2/6

3:15 p.m.-9:39 p.m.

1 stop8h 24m

Denver Intl

Mon 8/6

10:34 p.m.-9:13 a.m.

1 stop8h 39m

C$ 354

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 12/4

6:05 a.m.-9:43 a.m.

1 stop5h 38m

Denver Intl

Tue 28/4

5:45 a.m.-2:36 p.m.

1 stop6h 51m

C$ 365

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 12/4

6:25 p.m.-12:09 a.m.

1 stop7h 44m

Denver Intl

Wed 22/4

12:55 a.m.-9:25 a.m.

1 stop6h 30m

C$ 379

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 9/4

7:00 a.m.-3:07 p.m.

1 stop10h 07m

Denver Intl

Thu 23/4

6:27 p.m.-5:59 a.m.

1 stop9h 32m

C$ 379

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 1/5

2:15 p.m.-7:20 p.m.

2 stops7h 05m

Denver Intl

Wed 6/5

5:55 a.m.-3:55 p.m.

2 stops8h 00m

C$ 393

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 1/5

2:15 p.m.-7:20 p.m.

2 stops7h 05m

Denver Intl

Tue 5/5

8:40 a.m.-4:50 p.m.

2 stops6h 10m

C$ 393

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 17/3

4:55 p.m.-7:15 p.m.

Nonstop4h 20m

Denver Intl

Sat 21/3

7:00 p.m.-12:20 a.m.

Nonstop3h 20m

C$ 430

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/2

Showing 1-10 of 21 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 20 February 2026.

To ensure you get the cheapest price possible for a flight from Philadelphia to Denver, you should look to book at least 32 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, January is the cheapest month in which you can book a flight from Philadelphia to Denver (average of C$ 116). Flying from Philadelphia to Denver in May is currently the most expensive (average of C$ 193). 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 22 February 2026.

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 62% 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 7 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, Delta, and United Airlines fly from Philadelphia to Denver in about 4h 10m. The time it takes to get you to your destination can typically vary by up to 4h 24m. 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 United Airlines (86%), Air Canada (83%) or Qatar Airways (69%) 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, January is the cheapest month in which you can book a flight from Philadelphia to Denver (average of C$ 116). Flying from Philadelphia to Denver in May is currently the most expensive (average of C$ 193). 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
Thornton
Black Hawk

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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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