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Cheap flights from Philadelphia to Denver from £73

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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
22 Mar — 29 Mar1
1 adult
1 adult, Economy, 0 bags

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 20 February 2026.

Sat 25/408:00
PHL
-
DEN
Nonstop4h 20m
United Airlines
Tue 5/513:55
DEN
-
PHL
Nonstop3h 42m
United Airlines
Deal found 18/2£146
Fri 1/513:35
PHL
-
DEN
Nonstop4h 05m
Southwest
Tue 5/518:10
DEN
-
PHL
Nonstop3h 45m
Southwest
Deal found 19/2£161
Tue 24/315:30
PHL
-
DEN
Nonstop4h 30m
United Airlines
Tue 31/310:05
DEN
-
PHL
Nonstop3h 42m
United Airlines
Deal found 18/2£162
Wed 8/405:50
PHL
-
DEN
Nonstop4h 05m
Southwest
Fri 17/419:05
DEN
-
PHL
Nonstop3h 30m
Southwest
Deal found 19/2£169
Tue 17/315:30
PHL
-
DEN
Nonstop4h 30m
United Airlines
Tue 24/317:57
DEN
-
PHL
Nonstop3h 35m
United Airlines
Deal found 16/2£170
Fri 19/609:12
PHL
-
DEN
1 stop9h 45m
JetBlue
Sun 28/623:15
DEN
-
PHL
1 stop7h 04m
JetBlue
Deal found 19/2£171
Fri 24/415:40
PHL
-
DEN
Nonstop4h 21m
United Airlines
Mon 27/417:59
DEN
-
PHL
Nonstop3h 44m
United Airlines
Deal found 17/2£176
Tue 7/408:40
PHL
-
DEN
1 stop6h 54m
Delta
Sat 18/406:30
DEN
-
PHL
1 stop4h 59m
Delta
Deal found 19/2£177
Wed 11/305:30
PHL
-
DEN
Nonstop4h 10m
Southwest
Tue 17/318:30
DEN
-
PHL
Nonstop3h 20m
Southwest
Deal found 16/2£177
Fri 24/418:58
PHL
-
DEN
1 stop6h 21m
Delta
Tue 28/407:00
DEN
-
PHL
1 stop5h 36m
Delta
Deal found 17/2£183
Tue 7/406:00
PHL
-
DEN
1 stop6h 32m
Delta
Sun 19/418:27
DEN
-
PHL
1 stop9h 32m
Delta
Deal found 19/2£184
Tue 24/316:55
PHL
-
DEN
Nonstop4h 20m
Southwest
Tue 31/306:25
DEN
-
PHL
1 stop7h 30m
Southwest
Deal found 18/2£185

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 20 February 2026.

Round-trip from

£146

One-way from

£73

Popular in

December

Cheapest in

July

Average price

£245

Good one-way deal

£966 or less
United Airlines
  • United Airlines
  • 25/4-5/5
  • Nonstop
  • 8h 02m total
  • Philadelphia to Denver
Search Deals
United Airlines
  • United Airlines
  • 21/4
  • Nonstop
  • 4h 21m total
  • Philadelphia to Denver
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£14 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a one-way flight from Philadelphia to Denver Intl.
Search Deals

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 20 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

05:30-07:40

Nonstop4h 10m

Denver Intl

Tue 31/3

18:30-23:50

Nonstop3h 20m

£170

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 17/3

15:30-18:00

Nonstop4h 30m

Denver Intl

Tue 24/3

17:57-23:32

Nonstop3h 35m

£170

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 25/3

05:30-07:40

Nonstop4h 10m

Denver Intl

Sat 28/3

19:00-00:20

Nonstop3h 20m

£184

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 25/3

05:30-07:40

Nonstop4h 10m

Denver Intl

Mon 30/3

19:30-00:55

Nonstop3h 25m

£184

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 5/4

05:00-07:10

Nonstop4h 10m

Denver Intl

Tue 14/4

12:35-18:05

Nonstop3h 30m

£191

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 24/3

16:55-19:15

Nonstop4h 20m

Denver Intl

Mon 30/3

19:30-00:55

Nonstop3h 25m

£191

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 5/6

15:15-21:39

1 stop8h 24m

Denver Intl

Mon 8/6

22:34-09:13

1 stop8h 39m

£192

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 2/6

15:15-21:39

1 stop8h 24m

Denver Intl

Mon 8/6

22:34-09:13

1 stop8h 39m

£192

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 3/3

15:37-18:07

Nonstop4h 30m

Denver Intl

Tue 10/3

17:57-23:32

Nonstop3h 35m

£197

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 1/4

19:36-00:09

1 stop6h 33m

Denver Intl

Mon 6/4

18:15-05:41

1 stop9h 26m

£199

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 20 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 18 February 2026.

Booking 32 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 £63). Flying from Philadelphia to Denver in June is currently the most expensive (average of £105). 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 20 February 2026.

It’s optimal to fly from Philadelphia to Denver in the evening. By choosing this option you can save up to 55% 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 and Delta 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 2h 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 (86%), Air Canada (83%), Qatar Airways (69%).

  • What are the cheapest flights from Philadelphia to Denver?

    Looking for the cheapest flight from Philadelphia to Denver? While on average our users pay £966, our data indicates the cheapest price to be £966. The most popular route (Philadelphia - Denver Intl), is priced around £133.

  • 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 £63). Flying from Philadelphia to Denver in June is currently the most expensive (average of £105). 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

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