Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Philadelphia to Denver from £71

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
6 Jul — 13 Jul1
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 1 July 2025.

Round-trip from

£144

One-way from

£71

Popular in

December

Cheapest in

September

Average price

£208
Southwest
  • Southwest
  • 23/8-30/8
  • Nonstop
  • 7h 45m total
  • Philadelphia to Denver
Search Deals
American Airlines
  • American Airlines
  • 5/11
  • Nonstop
  • 4h 22m total
  • Philadelphia to Denver
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£8 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 July 2025
Search Deals

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 1 July 2025.

Sat 23/816:10PHL - DEN
Nonstop4h 05mSouthwest
Sat 30/807:55DEN - PHL
Nonstop3h 40mSouthwest
Deal found 30/6£144
Fri 5/1206:00PHL - DEN
1 stop8h 32mJetBlue
Sun 7/1223:59DEN - PHL
1 stop6h 37mJetBlue
Deal found 30/6£167
Wed 23/707:10PHL - DEN
1 stop9h 50mDelta
Tue 29/700:55DEN - PHL
1 stop5h 50mDelta
Deal found 30/6£187
Wed 27/815:40PHL - DEN
Nonstop4h 13mUnited Airlines
Thu 28/823:59DEN - PHL
Nonstop3h 36mUnited Airlines
Deal found 29/6£217

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 1 July 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 23/8

16:10-18:15

Nonstop4h 05m

Denver Intl

Sat 30/8

07:55-13:35

Nonstop3h 40m

£144

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 5/12

06:00-12:32

1 stop8h 32m

Denver Intl

Sun 7/12

23:59-08:36

1 stop6h 37m

£167

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 23/7

07:10-15:00

1 stop9h 50m

Denver Intl

Tue 29/7

00:55-08:45

1 stop5h 50m

£187

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 27/8

15:40-17:53

Nonstop4h 13m

Denver Intl

Thu 28/8

23:59-05:35

Nonstop3h 36m

£217

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 5/11

21:00-23:22

Nonstop4h 22m

£71

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 13/8

10:10-12:17

Nonstop4h 07m

£72

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 6/11

06:19-08:35

Nonstop4h 16m

£77

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 26/10

06:50-09:00

Nonstop4h 10m

£87

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 29/10

17:32-23:04

1 stop7h 32m

£90

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 23/7

17:21-22:29

1 stop7h 08m

£94

Flights are sorted by cheapest return flights first.

Deals found on 30/6

Showing 1-10 of 13 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 27 June 2025.

Booking 55 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 1 July 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.

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 1 July 2025.

The most flights from PHL to DEN are scheduled on a Friday (19 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (11 on average).

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 1 July 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, andDelta from Philadelphia to Denver by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

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
10,000 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

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
4,278 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

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
7,973 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

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
8,852 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

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
2,920 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

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 3 times in the past calendar month.

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

    Southwest, at £144, was found to be the cheapest airline from Philadelphia to Denver.Alternate airlines flying return to your destination include JetBlue and Delta. Southwest is currently priced 35% 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 £71 on American Airlines. Other airlines that offer cheap prices include United Airlines from £72 and Frontier from £77 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 (78%), United Airlines (75%), American Airlines (70%).

  • 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

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.
John F Kennedy Intl to Denver flights
LaGuardia 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.

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.
Site
©2025 Cheapflights