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$91+ 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Oct 19 — Oct 261
Sun 10/19
Sun 10/26
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Philadelphia are usually found in August or September, booked 63 days in advance, depart on a Thursday or Wednesday and return on a Thursday

Cheap 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 September 19, 2025.

Round-trip from

$177
(Cheapflightsfares)

One-way from

$91
(Frontier)

Popular in

December

Cheapest in

August

Average price

$278

Good round-trip deal

$245 or less

Good one-way deal

$140 or less
From Denver Intl to Philadelphia
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One-way flight from Denver Intl to Philadelphia
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Highest demand for flights based on searches. 9% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Denver Intl to Philadelphia.
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Price to beat on a one-way flight from Denver Intl to Philadelphia.
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Find 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 September 19, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1711:45 pmDEN - PHL
Nonstop3h 34mFrontier
Mon 10/206:42 amPHL - DEN
Nonstop4h 16mFrontier
Deal found 9/18$177
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1311:59 pmDEN - PHL
1 stop8h 35mFrontier
Fri 10/318:00 amPHL - DEN
1 stop7h 56mFrontier
Deal found 9/18$178
This Frontier deal was found by Cheapflights users on 9/18. 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 9/256:10 amDEN - PHL
1 stop8h 22mFrontier
Sat 9/276:45 amPHL - DEN
Nonstop4h 12mFrontier
Deal found 9/18$179
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:18 amDEN - PHL
1 stop11h 11mFrontier
Sat 10/181:02 pmPHL - DEN
1 stop8h 57mFrontier
Deal found 9/17$180
This CheapOair deal was found by Cheapflights users on 9/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/156:01 amDEN - PHL
1 stop8h 40mFrontier
Thu 10/164:10 pmPHL - DEN
1 stop18h 21mFrontier
Deal found 9/17$181
This Booking.com deal was found by Cheapflights users on 9/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/169:12 pmDEN - PHL
1 stop16h 01mFrontier
Sun 10/195:05 pmPHL - DEN
1 stop17h 28mFrontier
Deal found 9/18$182
This Kiwi.com deal was found by Cheapflights users on 9/17. 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.
Mon 11/312:59 amDEN - PHL
1 stop12h 51mFrontier
Mon 11/108:00 amPHL - DEN
1 stop7h 56mFrontier
Deal found 9/17$183
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/911:59 pmDEN - PHL
1 stop16h 25mFrontier
Tue 10/145:25 pmPHL - DEN
1 stop17h 18mFrontier
Deal found 9/17$184
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:15 pmDEN - PHL
Nonstop3h 42mFrontier
Wed 10/13:55 pmPHL - DEN
1 stop30h 03mFrontier
Deal found 9/18$185
This Cheapflightsfares deal was found by Cheapflights users on 9/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/312:04 amDEN - PHL
1 stop18h 52mFrontier
Wed 10/811:34 amPHL - DEN
1 stop22h 41mFrontier
Deal found 9/18$186
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/912:34 amDEN - PHL
1 stop21h 51mFrontier
Sun 10/125:05 pmPHL - DEN
1 stop17h 28mFrontier
Deal found 9/17$187
This Booking.com deal was found by Cheapflights users on 9/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/231:42 pmDEN - PHL
1 stop9h 17mFrontier
Sun 10/268:34 amPHL - DEN
1 stop18h 17mFrontier
Deal found 9/18$188

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 September 19, 2025.
Use the filters below to find and compare flights from Denver to Philadelphia that are best for you.

Fly from

Denver

Fly to

Philadelphia

Route

Depart

Return

Price

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Mon 10/27

6:55 pm-12:20 am

Nonstop3h 25m

Philadelphia

Wed 10/29

4:45 pm-6:55 pm

Nonstop4h 10m

$198

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 11/15

9:35 am-3:00 pm

Nonstop3h 25m

Philadelphia

Tue 11/18

1:50 pm-6:10 pm

1 stop6h 20m

$208

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 10/17

6:55 pm-12:20 am

Nonstop3h 25m

Philadelphia

Tue 10/21

7:20 am-9:30 am

Nonstop4h 10m

$209

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 10/14

5:32 pm-11:09 pm

Nonstop3h 37m

Philadelphia

Tue 10/21

10:00 am-12:06 pm

Nonstop4h 06m

$249

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 12/5

12:50 am-11:31 am

1 stop8h 41m

Philadelphia

Mon 12/8

6:45 am-2:09 pm

1 stop9h 24m

$257

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 10/29

5:37 pm-11:09 pm

Nonstop3h 32m

Philadelphia

Tue 11/4

9:45 am-12:07 pm

Nonstop4h 22m

$258

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 10/23

1:58 pm-7:35 pm

Nonstop3h 37m

Philadelphia

Sun 10/26

9:45 am-12:07 pm

Nonstop4h 22m

$273

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 11/15

9:35 am-3:00 pm

Nonstop3h 25m

Philadelphia

Sat 11/22

1:45 pm-9:50 pm

2 stops10h 05m

$292

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 10/21

1:30 pm-10:10 pm

2 stops6h 40m

Philadelphia

Sat 10/25

6:00 am-12:30 pm

2 stops8h 30m

$307

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 10/22

12:34 am-3:50 pm

1 stop13h 16m

$94

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/19

Showing 1-10 of 21 results
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The best insider tips for Denver to Philadelphia flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Denver to Philadelphia trip
Airports
DEN

For a quick security experience at DEN, reserve a time online for general screening. It's available for all travelers, not just TSA PreCheck users.

Read more about DENby Emily Zemler
PHL

Use SEPTA's Airport Line for a quick trip to Center City Philadelphia. Stations are conveniently located outside Terminals A, B, C/D, and E/F.

Read more about PHLby Mark Chesnut
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

Mark Chesnut

Mark Chesnut

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 Zemler

Emily Zemler

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

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?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Philadelphia. Price data was last updated on September 12, 2025.

To ensure you get the cheapest price possible for a flight from Denver to Philadelphia, you should look to book at least 63 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, August is the cheapest month in which you can book a flight from Denver to Philadelphia (average of $236). Flying from Denver to Philadelphia in March is currently the most expensive (average of $295). 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 September 19, 2025.

It’s typically best to fly out from Denver to Philadelphia in the afternoon. Doing so could potentially save you 53% 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 September 14, 2025.

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

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 September 19, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United 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
4,242 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,964 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,926 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,171 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 14 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 54 times in the past calendar month.

  • How long is the flight from Denver to Philadelphia?

    Airlines like Southwest and United Airlines fly from Denver to Philadelphia in about 3h 25m. The time it takes to get you to your destination is usually consistent. The distance from Denver to Philadelphia is about 1553 mi. Generally, flights for this route are nonstop.

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

    Currently priced at $116, 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 Delta and United Airlines - these airlines can fly you to your destination from $128 and $189, respectively. Users have found that Frontier is 62% 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 $94. Users have also found prices from $120 and $120 on United Airlines and Southwest, 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 American Airlines (82%), United Airlines (78%) or British Airways (78%) 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 $89. On average you can expect to pay $919. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $140.

  • 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, August is the cheapest month in which you can book a flight from Denver to Philadelphia (average of $236). Flying from Denver to Philadelphia in March is currently the most expensive (average of $295). 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
Vineland
Wildwood
King of Prussia
Pottstown
Reading
Dewey Beach
Ephrata
Camden
Ocean City
Cherry Hill
Dover
Elkton
Essington
Willow Grove
Newark
Millville
Chester
Exton
Havre de Grace
Plymouth Meeting

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Denver to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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Denver to John F Kennedy Intl flights
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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 September 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$116Average$235FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$306FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$189Average$442FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$196Average$336FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$198Average$351FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$228Average$325FlexibilityNo cancel feeOn-time62%

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