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Cheap flights from Philadelphia to Denver from £66

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
18 Oct — 25 Oct1
1 adult
1 adult, Economy

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 September 2025.

Round-trip from

£125

One-way from

£66

Popular in

December

Cheapest in

August

Average price

£212
United Airlines
  • United Airlines
  • 18/10-25/10
  • Nonstop
  • 7h 49m total
  • Philadelphia to Denver
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United Airlines
  • United Airlines
  • 11/10
  • Nonstop
  • 4h 12m total
  • Philadelphia to Denver
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£11 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 September 2025
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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 18 September 2025.

Sat 18/1015:45PHL - DEN
Nonstop4h 12mUnited Airlines
Sat 25/1013:58DEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 16/9£125
Tue 21/1010:00PHL - DEN
Nonstop4h 06mUnited Airlines
Fri 24/1013:58DEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 15/9£145
Wed 15/1008:00PHL - DEN
Nonstop4h 06mUnited Airlines
Sat 18/1010:00DEN - PHL
Nonstop3h 41mUnited Airlines
Deal found 16/9£151
Tue 18/1116:55PHL - DEN
Nonstop4h 10mSouthwest
Wed 3/1208:15DEN - PHL
1 stop4h 50mSouthwest
Deal found 15/9£152
Sat 25/1006:00PHL - DEN
2 stops8h 30mSouthwest
Sat 1/1117:40DEN - PHL
Nonstop3h 30mSouthwest
Deal found 18/9£156
Tue 14/1007:20PHL - DEN
Nonstop4h 10mSouthwest
Sat 18/1008:15DEN - PHL
1 stop5h 25mSouthwest
Deal found 17/9£160
Wed 15/1007:20PHL - DEN
Nonstop4h 10mSouthwest
Wed 22/1017:05DEN - PHL
Nonstop3h 25mSouthwest
Deal found 17/9£167
Tue 14/1008:00PHL - DEN
Nonstop4h 06mUnited Airlines
Tue 21/1017:32DEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 16/9£171
Fri 7/1118:35PHL - DEN
Nonstop4h 10mSouthwest
Mon 10/1118:20DEN - PHL
Nonstop3h 25mSouthwest
Deal found 17/9£174
Wed 22/1007:20PHL - DEN
Nonstop4h 10mSouthwest
Sat 25/1017:40DEN - PHL
Nonstop3h 30mSouthwest
Deal found 16/9£174
Tue 21/1010:00PHL - DEN
Nonstop4h 06mUnited Airlines
Sat 25/1013:58DEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 15/9£175
Fri 3/1015:45PHL - DEN
Nonstop4h 12mUnited Airlines
Tue 7/1017:32DEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 16/9£179

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 September 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 21/10

10:00-12:06

Nonstop4h 06m

Denver Intl

Tue 21/10

17:32-23:09

Nonstop3h 37m

£175

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 3/12

16:32-23:04

1 stop8h 32m

Denver Intl

Mon 8/12

23:59-09:39

1 stop7h 40m

£180

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 18/2

08:25-15:07

1 stop8h 42m

Denver Intl

Wed 25/2

15:10-00:22

1 stop7h 12m

£188

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 1/11

11:49-15:42

1 stop5h 53m

Denver Intl

Tue 4/11

11:05-18:09

1 stop5h 04m

£188

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 17/12

06:00-10:17

1 stop6h 17m

Denver Intl

Thu 25/12

10:48-20:17

1 stop7h 29m

£189

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 6/11

19:35-23:15

1 stop5h 40m

Denver Intl

Wed 12/11

08:00-17:35

2 stops7h 35m

£192

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 8/10

05:25-09:45

1 stop6h 20m

Denver Intl

Sat 11/10

17:40-23:10

Nonstop3h 30m

£218

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 23/1

13:10-17:57

1 stop6h 47m

Denver Intl

Tue 27/1

10:15-15:50

Nonstop3h 35m

£221

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 14/10

07:20-09:30

Nonstop4h 10m

Denver Intl

Thu 16/10

18:55-00:20

Nonstop3h 25m

£225

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 22/10

08:00-10:06

Nonstop4h 06m

Denver Intl

Thu 23/10

13:58-19:35

Nonstop3h 37m

£230

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 20 results
1
2

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 12 September 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, January is the cheapest month in which you can book a flight from Philadelphia to Denver (average of £667). Flying from Philadelphia to Denver in July is currently the most expensive (average of £983). 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 September 2025.

When flying from Philadelphia to Denver, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight 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?

    Flights from Philadelphia to Denver Intl have been viewed 2 times in the past calendar month.

  • How long is the flight from Philadelphia to Denver?

    Airlines like United Airlines and JetBlue fly from Philadelphia to Denver in about 4h 06m. The time it takes to get you to your destination can typically vary by up to 4h 26m. 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: Aer Lingus (100%), Air Canada (86%), Qatar Airways (85%).

  • 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, January is the cheapest month in which you can book a flight from Philadelphia to Denver (average of £667). Flying from Philadelphia to Denver in July is currently the most expensive (average of £983). 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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