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Cheap flights from Philadelphia to Denver from £68

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
18 Dec — 25 Dec1
1 adult
1 adult, Economy, 0 bags

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 18 November 2025.

Round-trip from

£121

One-way from

£68

Popular in

December

Cheapest in

August

Average price

£255
Southwest
  • Southwest
  • 17/12-24/12
  • Nonstop
  • 7h 35m 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 (£10 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
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Average for round-trip flights in November 2025
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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 18 November 2025.

Wed 17/1217:00PHL - DEN
Nonstop4h 10mSouthwest
Wed 24/1217:25DEN - PHL
Nonstop3h 25mSouthwest
Deal found 17/11£121
Tue 16/1206:35PHL - DEN
Nonstop4h 10mSouthwest
Wed 17/1210:55DEN - PHL
Nonstop3h 25mSouthwest
Deal found 17/11£128
Mon 24/1105:20PHL - DEN
2 stops8h 50mSouthwest
Thu 27/1113:45DEN - PHL
Nonstop3h 25mSouthwest
Deal found 16/11£132
Sun 14/1208:00PHL - DEN
Nonstop4h 22mUnited Airlines
Wed 17/1217:50DEN - PHL
Nonstop3h 32mUnited Airlines
Deal found 17/11£166
Wed 10/1206:35PHL - DEN
Nonstop4h 10mSouthwest
Fri 12/1218:20DEN - PHL
Nonstop3h 25mSouthwest
Deal found 17/11£166
Mon 24/1105:20PHL - DEN
2 stops8h 50mSouthwest
Wed 3/1217:15DEN - PHL
Nonstop3h 20mSouthwest
Deal found 16/11£167
Sat 6/1215:25PHL - DEN
1 stop5h 40mSouthwest
Tue 9/1210:55DEN - PHL
Nonstop3h 25mSouthwest
Deal found 17/11£171
Wed 10/1206:35PHL - DEN
Nonstop4h 10mSouthwest
Thu 11/1206:10DEN - PHL
1 stop6h 55mSouthwest
Deal found 17/11£174

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 18 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

Sun 14/12

08:00-10:22

Nonstop4h 22m

Denver Intl

Wed 17/12

17:50-23:22

Nonstop3h 32m

£166

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 9/12

17:00-19:10

Nonstop4h 10m

Denver Intl

Tue 16/12

09:40-17:20

1 stop5h 40m

£171

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 24/1

15:43-18:12

Nonstop4h 29m

Denver Intl

Tue 27/1

10:15-15:50

Nonstop3h 35m

£189

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 14/1

07:00-13:37

1 stop8h 37m

Denver Intl

Tue 20/1

00:30-11:11

1 stop8h 41m

£204

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Mon 19/1

06:55-13:37

1 stop8h 42m

Denver Intl

Sun 25/1

00:30-09:23

1 stop6h 53m

£210

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 23/1

06:00-10:08

1 stop6h 08m

Denver Intl

Sun 25/1

00:30-09:23

1 stop6h 53m

£210

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Mon 8/12

06:00-11:15

2 stops7h 15m

Denver Intl

Wed 10/12

08:05-17:20

2 stops7h 15m

£217

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 7/12

05:45-10:45

2 stops7h 00m

Denver Intl

Mon 15/12

06:10-15:05

1 stop6h 55m

£223

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 3/12

06:00-11:20

1 stop7h 20m

Denver Intl

Sat 6/12

09:35-15:00

Nonstop3h 25m

£223

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Mon 5/1

18:35-20:45

Nonstop4h 10m

Denver Intl

Wed 7/1

16:35-22:00

Nonstop3h 25m

£241

Flights are sorted by cheapest return flights first.

Deals found on 15/11

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 return 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 return flight from Philadelphia to Denver. Price data was last updated on 14 November 2025.

Booking 40 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to Denver. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 £67). Flying from Philadelphia to Denver in May is currently the most expensive (average of £109). 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 18 November 2025.

It’s optimal to fly from Philadelphia to Denver in the evening. By choosing this option you can save up to 62% on the cost of your flight, compared to 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?

    Flights from Philadelphia to Denver Intl have been viewed 1 times in the past calendar month.

  • How long is the flight from Philadelphia to Denver?

    Airlines like Southwest, JetBlue, and United Airlines fly from Philadelphia to Denver in about 4h 29m. The time it takes to get you to your destination can typically vary by up to 7h 11m. Philadelphia and Denver are separated by a distance of 1553 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most reliable airlines from Philadelphia to Denver?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Philadelphia to Denver on time: United Airlines (92%), Air Canada (91%), Frontier (83%).

  • 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 holiday 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 £67). Flying from Philadelphia to Denver in May is currently the most expensive (average of £109). 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
Winter Park
Frisco

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.
Newark to Denver flights
John F Kennedy Intl to Denver flights
LaGuardia to Denver flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers 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?

Deals for Philadelphia to Denver flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Philadelphia to Denver for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Philadelphia to Denver with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Philadelphia to Denver, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Philadelphia to Denver become cheaper?

Yes, Cheapflights offers price alerts on Philadelphia to Denver flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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