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$131+ Cheap flights from Denver to Philadelphia (DEN - PHL)

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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Aug 21 — Aug 281
Fri 8/21
Fri 8/28
1 adult, Economy
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Find cheap flights from Denver to Philadelphia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Denver Intl to Philadelphia are usually found in February or September, booked 43 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from Denver to Philadelphia

Cheapest flights from Denver to Philadelphia
Explore the most affordable flight options available from Denver to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 22, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:43 am
DEN
-
PHL
1 stop18h 32m
Frontier
Thu 9/38:37 pm
PHL
-
DEN
Nonstop4h 27m
Frontier
Deal found 7/21$237
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:59 pm
DEN
-
PHL
Nonstop3h 37m
Frontier
Sun 9/2012:43 pm
PHL
-
DEN
1 stop11h 50m
Frontier
Deal found 7/21$238
This Kiwi.com deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:43 am
DEN
-
PHL
1 stop18h 32m
Frontier
Sun 8/2310:01 pm
PHL
-
DEN
2 stops26h 09m
Frontier
Deal found 7/20$239
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:30 am
DEN
-
PHL
1 stop9h 45m
Frontier
Thu 10/19:14 am
PHL
-
DEN
2 stops12h 50m
Frontier
Deal found 7/21$240
This Kiwi.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/711:59 pm
DEN
-
PHL
Nonstop3h 40m
Frontier
Sun 8/306:30 am
PHL
-
DEN
1 stop9h 31m
Frontier
Deal found 7/17$241
This Kiwi.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:05 am
DEN
-
PHL
Nonstop3h 44m
Frontier
Sun 8/306:30 am
PHL
-
DEN
1 stop9h 31m
Frontier
Deal found 7/17$242
This Frontier deal was found by Cheapflights users on 7/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:59 pm
DEN
-
PHL
Nonstop3h 40m
Frontier
Thu 9/38:37 pm
PHL
-
DEN
Nonstop4h 27m
Frontier
Deal found 7/18$243
This Super.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:59 pm
DEN
-
PHL
Nonstop3h 37m
Frontier
Mon 9/288:44 pm
PHL
-
DEN
Nonstop4h 20m
Frontier
Deal found 7/19$244
This Kiwi.com deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:30 am
DEN
-
PHL
1 stop13h 58m
Frontier
Sun 8/238:30 am
PHL
-
DEN
1 stop15h 35m
Frontier
Deal found 7/19$245
This Cheapflightsfares deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:05 am
DEN
-
PHL
Nonstop3h 44m
Frontier
Tue 8/1112:44 pm
PHL
-
DEN
Nonstop4h 14m
Frontier
Deal found 7/19$246
This Expedia deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/611:37 pm
DEN
-
PHL
1 stop6h 45m
Multiple Airlines
Tue 8/1112:44 pm
PHL
-
DEN
Nonstop4h 14m
Multiple Airlines
Deal found 7/20$247
This Frontier deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:59 pm
DEN
-
PHL
Nonstop3h 40m
Frontier
Thu 8/278:37 pm
PHL
-
DEN
Nonstop4h 27m
Frontier
Deal found 7/19$248

Find flight deals from Denver to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Philadelphia (PHL). 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 July 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$237
(Kiwi.com)

One-way from

$131
(Super.com)

Popular in

June

Cheapest in

February

Average price

$381

Good round-trip deal

$308 or less

Good one-way deal

$188 or less
Provider with most accurate pricing for Denver Intl-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Philadelphia flights.
Search Deals
From Denver Intl to Philadelphia
Search Deals
One-way flight from Denver Intl to Philadelphia
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($65 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Denver Intl to Philadelphia.
Search Deals
Price to beat on a one-way flight from Denver Intl to Philadelphia.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Philadelphia 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 2,558,603 searches. Data last updated July 22, 2026.
Use the filters below to find and compare flights from Denver to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Mon 10/5

12:55 am-11:00 am

1 stop8h 05m

Philadelphia

Sat 10/10

6:10 am-9:34 am

1 stop5h 24m

$353
Quickest round-trip

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 8/8

3:15 pm-8:45 pm

Nonstop3h 30m

Philadelphia

Mon 8/17

5:25 am-7:15 am

Nonstop3h 50m

$357

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 9/16

7:15 am-4:13 pm

1 stop6h 58m

Philadelphia

Mon 9/21

6:59 pm-11:35 pm

1 stop6h 36m

$375

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 9/9

11:15 am-8:55 pm

2 stops7h 40m

Philadelphia

Mon 9/14

6:20 am-11:00 am

2 stops6h 40m

$376

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 8/29

5:20 pm-10:50 pm

Nonstop3h 30m

Philadelphia

Sun 8/30

5:00 am-6:50 am

Nonstop3h 50m

$377

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 8/27

7:00 am-4:00 pm

2 stops7h 00m

Philadelphia

Sat 9/5

12:10 pm-6:30 pm

2 stops8h 20m

$387

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Mon 9/14

4:30 pm-12:40 am

1 stop6h 10m

Philadelphia

Sat 9/19

6:15 am-9:48 am

1 stop5h 33m

$406

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 9/17

7:00 am-4:00 pm

2 stops7h 00m

Philadelphia

Mon 9/21

6:20 am-11:00 am

2 stops6h 40m

$406

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 9/15

7:15 am-4:13 pm

1 stop6h 58m

Philadelphia

Fri 9/25

6:59 pm-11:35 pm

1 stop6h 36m

$407

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 8/26

8:35 am-6:00 pm

2 stops7h 25m

Philadelphia

Fri 8/28

6:20 am-11:00 am

2 stops6h 40m

$408

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Denver to Philadelphia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Philadelphia in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*1 star
eDreamsPrice Accuracy2 starsTrust Score*3 stars
Super.comPrice Accuracy-Trust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Philadelphia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Philadelphia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Denver to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Denver with our price prediction graph.
Estimated round-trip 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 Denver to Philadelphia

How far ahead should I book a flight from Denver to Philadelphia?

To ensure you get the cheapest price possible for a flight from Denver to Philadelphia, you should look to book at least 42 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Denver to Philadelphia?

Currently, February is the cheapest month in which you can book a flight from Denver to Philadelphia (average of $271). Flying from Denver to Philadelphia in June is currently the most expensive (average of $467). 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 DEN to PHL?

Find hourly flight availability from Denver to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 22, 2026.

It’s typically best to fly out from Denver to Philadelphia in the evening. Doing so could potentially save you 39% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Denver to Philadelphia?

Use this chart to determine the cheapest time to fly round-trip from Denver to Philadelphia. Price data was last updated on July 18, 2026.

Travelers seeking maximum savings on their Denver to Philadelphia flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Denver to Philadelphia?

The best insider tips for Denver to Philadelphia flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Denver to Philadelphia trip
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

Mark Chesnut is a travel writer and public speaker with more than 30 years of experience. The 2019 winner of the NLGJA Excellence in Travel Writing Award, Mark is the author of the book “Prepare for Departure” and has covered air travel for multiple top consumer and trade media outlets.

Read more
Emily Zemler

Emily Zemler

Expert on DEN

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated July 22, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andAmerican Airlines from Denver to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,241 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
Southwest
8.0
Very good
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
United Airlines
7.4
Good
10,018 reviews
Southwest
8.0
Very good
4,241 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
American Airlines
7.1
Good
11,838 reviews
Southwest
8.0
Very good
4,241 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
JetBlue
7.1
Good
3,019 reviews
Southwest
8.0
Very good
4,241 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
Frontier
5.6
Fair
2,771 reviews
Southwest
8.0
Very good
4,241 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.

Related info for your journey

Find useful and relevant information for your journey from Denver to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Denver to Philadelphia?

    If you book a flight from Denver to Philadelphia, you will be flying from Denver Intl to Philadelphia. Flights to Philadelphia (PHL) from Denver Intl (DEN) take 3h 20m for a nonstop flight. There are 15 flights from Denver Intl to Philadelphia per day from 6 airlines.

  • How popular is this Denver to Philadelphia flight route?

    Flights from Denver Intl to Philadelphia have been viewed 76 times in the past calendar month.

  • How long is the flight from Denver to Philadelphia?

    Airlines like Delta and Southwest fly from Denver to Philadelphia in about 3h 30m. The time it takes to get you to your destination can typically vary by up to 4h 35m. The distance from Denver to Philadelphia is about 1553 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Currently priced at $118, Frontier will fly you from Denver to Philadelphia and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from JetBlue and United Airlines - these airlines can fly you to your destination from $122 and $201, respectively. Users have found that Frontier is 66% cheaper than the other options available to this destination.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $64. Users have also found prices from $98 and $107 on Southwest and American Airlines, respectively.

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

    No one likes to see their flight delayed. When booking a flight from Denver to Philadelphia consider choosing Air Canada (76%), Aer Lingus (74%) or Frontier (71%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Denver to Philadelphia?

    The cheapest flight price from Denver to Philadelphia is $126. On average you can expect to pay $827. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $91.

  • Can I find deals for flights from Denver to Philadelphia that include hotel bookings?

    Yes. In addition to deals on Denver to Philadelphia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to Philadelphia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to Philadelphia.

  • Can I find deals for business class flights from Denver to Philadelphia?

    Yes. Cheapflights offers flight deals from Denver to Philadelphia 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 Denver to Philadelphia?

    Currently, February is the cheapest month in which you can book a flight from Denver to Philadelphia (average of $271). Flying from Denver to Philadelphia in June is currently the most expensive (average of $467). 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

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
King of Prussia
Reading
Camden
Ocean City
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Wildwood Crest
Pottstown
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Vineland

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.

Top 6 airlines flying from Denver to Philadelphia

Discover the top 6 airlines that operate flights from Denver to Philadelphia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$276FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$122Average$290FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$201Average$503FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$218Average$398FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$225Average$450FlexibilityNo cancel feeOn-time63%
DeltaCheapest$236Average$387FlexibilityNo cancel feeOn-timeN/A

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