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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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
4 May — 11 May1
1 adult

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 29 April 2025.

Round-trip from

£153

One-way from

£73

Popular in

December

Cheapest in

September

Average price

£235
United Airlines
  • United Airlines
  • 4/7-12/7
  • Nonstop
  • 7h 57m total
  • Philadelphia to Denver
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United Airlines
  • United Airlines
  • 4/6
  • Nonstop
  • 4h 07m total
  • Philadelphia to Denver
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£12 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£5 potential savings vs. average return price).
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Average for round-trip flights in April 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 29 April 2025.

Fri 4/715:39PHL - DEN
Nonstop4h 19mUnited Airlines
Sat 12/723:59DEN - PHL
Nonstop3h 38mUnited Airlines
Deal found 28/4£153
Tue 13/505:25PHL - DEN
Nonstop4h 10mSouthwest
Mon 19/518:05DEN - PHL
Nonstop3h 40mSouthwest
Deal found 28/4£162
Fri 30/506:00PHL - DEN
1 stop8h 28mJetBlue
Tue 3/622:38DEN - PHL
1 stop9h 00mJetBlue
Deal found 28/4£171
Fri 4/714:05PHL - DEN
1 stop8h 13mDelta
Tue 8/707:05DEN - PHL
1 stop5h 55mDelta
Deal found 28/4£192
Thu 21/812:22PHL - DEN
1 stop7h 39mSun Country Air
Sun 24/817:43DEN - PHL
1 stop15h 31mSun Country Air
Deal found 28/4£281

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 29 April 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

Fri 4/7

15:39-17:58

Nonstop4h 19m

Denver Intl

Sat 12/7

23:59-05:37

Nonstop3h 38m

£153

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 13/5

05:25-07:35

Nonstop4h 10m

Denver Intl

Mon 19/5

18:05-23:45

Nonstop3h 40m

£162

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 30/5

06:00-12:28

1 stop8h 28m

Denver Intl

Tue 3/6

22:38-09:38

1 stop9h 00m

£171

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 4/7

16:05-22:39

1 stop8h 34m

Denver Intl

Fri 11/7

00:55-08:34

1 stop5h 39m

£192

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 21/8

12:22-18:01

1 stop7h 39m

Denver Intl

Sun 24/8

17:43-11:14

1 stop15h 31m

£281

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 4/6

10:10-12:17

Nonstop4h 07m

£73

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 2/7

19:30-23:40

1 stop6h 10m

£88

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 25/5

06:00-12:28

1 stop8h 28m

£94

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 24/6

06:00-09:44

1 stop5h 44m

£97

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 20/7

07:00-08:45

1 stop27h 45m

£118

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 11 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 25 April 2025.

Booking 56 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 £1,030). 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 29 April 2025.

It’s optimal to fly from Philadelphia to Denver in the evening. By choosing this option you can save up to 39% on the cost of your flight, compared to a flight at midday.

Weekly flight availability from Philadelphia to Denver

Explore weekly flight availability from Philadelphia to Denver. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 29 April 2025.

The most flights from PHL to DEN are scheduled on a Monday (14 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (9 on average).

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 13.0 - 58.0 inches per month. May is typically the wettest month, when rainfall can reach 58.0 mm. January is typically the driest time to visit Denver when rainfall is around 13.0 mm.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated 29 April 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Philadelphia to Denver have to say. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very Good
9,961 reviews
Alaska Airlines
8.0
Very Good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very Good
4,295 reviews
Alaska Airlines
8.0
Very Good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very Good
7,929 reviews
Alaska Airlines
8.0
Very Good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very Good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,922 reviews
Alaska Airlines
8.0
Very Good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 6 times in the past calendar month.

  • What are the cheapest airlines flying from Philadelphia to Denver round-trip?

    United Airlines, at £153, was found to be the cheapest airline from Philadelphia to Denver.Alternate airlines flying return to your destination include Southwest and JetBlue. United Airlines is currently priced 32% below the average price you’ll pay for this route.

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

    One-way options have recently been found by users for as low as £73 on United Airlines. Other airlines that offer cheap prices include Southwest from £88 and JetBlue from £94 one-way.

  • 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: Air Canada (89%), Frontier (88%), 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 £1,030). 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 Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Winter Park
Frisco

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