Find flights
Deals
When to book
FAQs

Cheap flights from Philadelphia to Denver from C$ 127

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 17/1. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
5 Dec — 12 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

Find 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 5 November 2025.

Wed 3/128:00 a.m.PHL - DEN
Nonstop4h 22mUnited Airlines
Wed 10/125:50 p.m.DEN - PHL
Nonstop3h 32mUnited Airlines
Deal found 3/11C$ 256
Sat 6/123:35 p.m.PHL - DEN
Nonstop4h 20mUnited Airlines
Mon 8/125:50 p.m.DEN - PHL
Nonstop3h 32mUnited Airlines
Deal found 3/11C$ 279
Wed 3/128:00 a.m.PHL - DEN
Nonstop4h 22mUnited Airlines
Wed 3/125:50 p.m.DEN - PHL
Nonstop3h 32mUnited Airlines
Deal found 4/11C$ 282
Wed 31/126:35 a.m.PHL - DEN
Nonstop4h 10mSouthwest
Wed 7/110:50 a.m.DEN - PHL
Nonstop3h 30mSouthwest
Deal found 4/11C$ 287
Tue 18/119:45 a.m.PHL - DEN
Nonstop4h 22mUnited Airlines
Wed 3/125:50 p.m.DEN - PHL
Nonstop3h 32mUnited Airlines
Deal found 3/11C$ 289
Wed 3/123:05 p.m.PHL - DEN
1 stop8h 30mSouthwest
Wed 10/1210:55 a.m.DEN - PHL
Nonstop3h 25mSouthwest
Deal found 3/11C$ 293
Wed 3/128:00 a.m.PHL - DEN
Nonstop4h 22mUnited Airlines
Fri 5/125:50 p.m.DEN - PHL
Nonstop3h 32mUnited Airlines
Deal found 3/11C$ 311
Wed 3/126:00 a.m.PHL - DEN
1 stop7h 20mSouthwest
Wed 3/125:15 p.m.DEN - PHL
Nonstop3h 20mSouthwest
Deal found 4/11C$ 317

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 5 November 2025.

Round-trip from

C$ 224

One-way from

C$ 127

Popular in

December

Cheapest in

August

Average price

C$ 460

Good round-trip deal

C$ 541 or less
United Airlines
  • United Airlines
  • 6/12-9/12
  • 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. 4% potential increase in price (C$ 31 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
Search Deals
Price to beat on a round-trip flight from Philadelphia to Denver Intl.
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 5 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

Sat 17/1

12:40 p.m.-5:50 p.m.

1 stop7h 10m

Denver Intl

Sat 24/1

10:00 a.m.-3:40 p.m.

Nonstop3h 40m

C$ 301

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 10/1

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

Nonstop4h 20m

Denver Intl

Sat 17/1

5:30 a.m.-12:40 p.m.

1 stop5h 10m

C$ 301

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 27/1

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

Nonstop4h 20m

Denver Intl

Tue 3/2

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

1 stop6h 15m

C$ 365

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 14/1

1:50 p.m.-7:20 p.m.

1 stop7h 30m

Denver Intl

Wed 21/1

4:35 p.m.-10:00 p.m.

Nonstop3h 25m

C$ 365

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 28/1

9:40 a.m.-1:35 p.m.

1 stop5h 55m

Denver Intl

Tue 10/2

2:42 p.m.-10:52 p.m.

1 stop6h 10m

C$ 379

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Mon 24/11

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

Nonstop4h 10m

Denver Intl

Fri 28/11

6:35 a.m.-4:45 p.m.

1 stop8h 10m

C$ 394

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 5/12

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

2 stops7h 15m

Denver Intl

Mon 8/12

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

2 stops7h 15m

C$ 404

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Mon 23/2

5:50 a.m.-1:55 p.m.

2 stops10h 05m

Denver Intl

Fri 27/2

11:55 p.m.-11:10 a.m.

1 stop9h 15m

C$ 453

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 27/1

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

Nonstop4h 29m

Denver Intl

Tue 3/2

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

Nonstop3h 35m

C$ 463

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 28/1

8:09 a.m.-10:35 a.m.

Nonstop4h 26m

Denver Intl

Wed 4/2

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

Nonstop3h 35m

C$ 463

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 23 results
1
2
3

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 31 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, October is the cheapest month in which you can book a flight from Philadelphia to Denver (average of C$ 125). 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 5 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.

How much does it cost to fly round-trip from Philadelphia to Denver?

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 and Delta fly from Philadelphia to Denver in about 5h 55m. The time it takes to get you to your destination can typically vary by up to 1h 15m. 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 Southwest. According to our data, you can fly for as low as C$ 127. Users have also found prices from C$ 168 and C$ 169 on Delta and United Airlines, 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 (93%), 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$ 588, our data shows the cheapest flight currently is C$ 541. When looking at the most popular route, (Philadelphia - Denver Intl), you can expect to pay C$ 486 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$ 125). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.