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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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
17 Dec — 24 Dec1
1 adult
1 adult, Economy, 0 bags

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 November 2025.

Tue 16/126:35 a.m.PHL - DEN
Nonstop4h 10mSouthwest
Wed 17/1210:55 a.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 17/11C$ 237
Mon 24/115:20 a.m.PHL - DEN
2 stops8h 50mSouthwest
Thu 27/111:45 p.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 16/11C$ 244
Sun 14/128:00 a.m.PHL - DEN
Nonstop4h 22mUnited Airlines
Wed 17/125:50 p.m.DEN - PHL
Nonstop3h 32mUnited Airlines
Deal found 17/11C$ 306
Wed 10/126:35 a.m.PHL - DEN
Nonstop4h 10mSouthwest
Fri 12/126:20 p.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 17/11C$ 307
Mon 24/115:20 a.m.PHL - DEN
2 stops8h 50mSouthwest
Wed 3/125:15 p.m.DEN - PHL
Nonstop3h 20mSouthwest
Deal found 16/11C$ 309
Sat 6/123:25 p.m.PHL - DEN
1 stop5h 40mSouthwest
Tue 9/1210:55 a.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 17/11C$ 316
Wed 10/126:35 a.m.PHL - DEN
Nonstop4h 10mSouthwest
Thu 11/126:10 a.m.DEN - PHL
1 stop6h 55mSouthwest
Deal found 17/11C$ 321
Thu 27/116:14 a.m.PHL - DEN
1 stop5h 49mDelta
Thu 27/113:14 p.m.DEN - PHL
1 stop5h 36mDelta
Deal found 17/11C$ 333
Tue 16/123:35 p.m.PHL - DEN
Nonstop4h 20mUnited Airlines
Wed 31/125:35 p.m.DEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 17/11C$ 337

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 November 2025.

Round-trip from

C$ 223

One-way from

C$ 126

Popular in

December

Cheapest in

August

Average price

C$ 472

Good round-trip deal

C$ 539 or less
Southwest
  • Southwest
  • 14/2-20/2
  • Nonstop
  • 8h 00m total
  • Philadelphia to Denver
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United Airlines
  • United Airlines
  • 10/12
  • Nonstop
  • 4h 22m total
  • Philadelphia to Denver
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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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 November 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 6/1

3:43 p.m.-6:12 p.m.

Nonstop4h 29m

Denver Intl

Fri 9/1

5:55 p.m.-11:30 p.m.

Nonstop3h 35m

C$ 355

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 6/1

5:00 p.m.-7:20 p.m.

Nonstop4h 20m

Denver Intl

Wed 7/1

7:00 a.m.-5:25 p.m.

1 stop8h 25m

C$ 363

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 24/1

2:05 p.m.-4:25 p.m.

Nonstop4h 20m

Denver Intl

Tue 27/1

12:05 p.m.-8:20 p.m.

1 stop6h 15m

C$ 363

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 23/1

6:40 a.m.-9:05 a.m.

Nonstop4h 25m

Denver Intl

Mon 26/1

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

1 stop6h 15m

C$ 375

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 14/1

7:00 a.m.-1:37 p.m.

1 stop8h 37m

Denver Intl

Tue 20/1

12:30 a.m.-11:11 a.m.

1 stop8h 41m

C$ 377

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 23/1

6:00 a.m.-10:08 a.m.

1 stop6h 08m

Denver Intl

Sun 25/1

12:30 a.m.-9:23 a.m.

1 stop6h 53m

C$ 389

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Mon 8/12

6:00 a.m.-11:15 a.m.

2 stops7h 15m

Denver Intl

Wed 10/12

8:05 a.m.-5:20 p.m.

2 stops7h 15m

C$ 400

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 7/12

5:45 a.m.-10:45 a.m.

2 stops7h 00m

Denver Intl

Mon 15/12

6:10 a.m.-3:05 p.m.

1 stop6h 55m

C$ 411

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 3/12

6:00 a.m.-11:20 a.m.

1 stop7h 20m

Denver Intl

Sat 6/12

9:35 a.m.-3:00 p.m.

Nonstop3h 25m

C$ 413

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 17/1

12:41 p.m.-5:28 p.m.

1 stop6h 47m

Denver Intl

Mon 19/1

12:30 a.m.-9:23 a.m.

1 stop6h 53m

C$ 446

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/11

Showing 1-10 of 23 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 14 November 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, October is the cheapest month in which you can book a flight from Philadelphia to Denver (average of C$ 124). 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 November 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 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 United Airlines, Delta, and Southwest 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 1h 29m. Airlines will cover a distance of 2499 km. This flight may include one or multiple stops.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as C$ 126. Users have also found prices from C$ 133 and C$ 167 on Southwest and Delta, 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 United Airlines (92%), Air Canada (91%) or Frontier (83%) 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$ 587, our data shows the cheapest flight currently is C$ 539. When looking at the most popular route, (Philadelphia - Denver Intl), you can expect to pay C$ 484 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, October is the cheapest month in which you can book a flight from Philadelphia to Denver (average of C$ 124). 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

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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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