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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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Philadelphia are usually found in October or September, booked 63 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

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 August 14, 2025.

Round-trip from

$193
(Kiwi.com)

One-way from

$91
(CheapOair)

Popular in

December

Cheapest in

October

Average price

$289

Good round-trip deal

$238 or less

Good one-way deal

$132 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 ($7 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/14. 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 8/1812:59 amDEN - PHL
1 stop9h 05mFrontier
Sun 8/247:00 amPHL - DEN
1 stop14h 26mFrontier
Deal found 8/14$193
This CheapOair deal was found by Cheapflights users on 8/12. 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.
Fri 10/1711:45 pmDEN - PHL
Nonstop3h 34mFrontier
Mon 10/204:10 pmPHL - DEN
1 stop18h 54mFrontier
Deal found 8/12$194
This Mytrip deal was found by Cheapflights users on 8/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/106:01 pmDEN - PHL
Nonstop3h 42mFrontier
Sun 9/1410:21 amPHL - DEN
1 stop23h 24mFrontier
Deal found 8/13$195
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 8/1812:59 amDEN - PHL
1 stop9h 05mFrontier
Mon 8/256:20 amPHL - DEN
1 stop8h 47mFrontier
Deal found 8/12$196
This FlightHub deal was found by Cheapflights users on 8/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2011:15 pmDEN - PHL
Nonstop3h 39mFrontier
Tue 8/266:00 pmPHL - DEN
1 stop17h 20mFrontier
Deal found 8/12$197
This Cheapflightsfares deal was found by Cheapflights users on 8/12. 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 10/1011:45 pmDEN - PHL
Nonstop3h 34mFrontier
Mon 10/136:42 amPHL - DEN
Nonstop4h 16mFrontier
Deal found 8/12$198
This American Airlines deal was found by Cheapflights users on 8/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2311:29 amDEN - PHL
Nonstop3h 57mAmerican Airlines
Mon 9/299:20 pmPHL - DEN
Nonstop4h 05mAmerican Airlines
Deal found 8/12$199
This Frontier deal was found by Cheapflights users on 8/12. 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 10/27:15 pmDEN - PHL
Nonstop3h 42mFrontier
Mon 10/612:01 pmPHL - DEN
1 stop9h 17mFrontier
Deal found 8/12$200
This Frontier deal was found by Cheapflights users on 8/12. 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.
Fri 8/1512:59 amDEN - PHL
1 stop8h 05mFrontier
Mon 8/256:25 amPHL - DEN
Nonstop4h 13mFrontier
Deal found 8/12$201
This Frontier deal was found by Cheapflights users on 8/12. 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.
Wed 9/2412:59 amDEN - PHL
1 stop7h 57mFrontier
Mon 9/296:45 amPHL - DEN
Nonstop4h 12mFrontier
Deal found 8/12$202
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 8/205:50 pmDEN - PHL
1 stop14h 02mFrontier
Sun 8/247:00 amPHL - DEN
1 stop14h 26mFrontier
Deal found 8/14$203
This FlightHub deal was found by Cheapflights users on 8/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1811:30 pmDEN - PHL
Nonstop3h 39mFrontier
Tue 8/266:00 pmPHL - DEN
1 stop17h 20mFrontier
Deal found 8/12$204

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 August 14, 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

Thu 10/2

12:04 am-11:38 am

1 stop9h 34m

Philadelphia

Sun 10/5

12:02 pm-7:07 pm

1 stop9h 05m

$193

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 9/4

6:10 am-7:08 pm

2 stops10h 58m

Philadelphia

Mon 9/8

1:02 pm-8:47 pm

1 stop9h 45m

$193

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Mon 8/18

12:59 am-12:04 pm

1 stop9h 05m

Philadelphia

Sun 8/24

7:00 am-7:26 pm

1 stop14h 26m

$193

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 9/10

12:59 am-10:56 am

1 stop7h 57m

Philadelphia

Thu 9/18

5:01 am-11:42 pm

2 stops20h 41m

$193

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 10/2

8:30 pm-9:25 am

1 stop10h 55m

Philadelphia

Sun 10/5

6:30 pm-8:58 am

2 stops16h 28m

$194

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 9/13

12:59 am-10:56 am

1 stop7h 57m

Philadelphia

Sat 9/20

3:55 pm-7:20 am

2 stops17h 25m

$194

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 8/20

12:34 am-12:08 pm

1 stop9h 34m

Philadelphia

Mon 8/25

6:25 am-8:38 am

Nonstop4h 13m

$194

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 10/17

9:19 pm-6:44 pm

2 stops19h 25m

Philadelphia

Sun 10/19

6:10 am-11:36 am

1 stop7h 26m

$195

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 10/8

11:45 pm-5:19 am

Nonstop3h 34m

Philadelphia

Thu 10/16

6:42 am-8:58 am

Nonstop4h 16m

$195

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 11/5

12:59 am-6:44 pm

1 stop15h 45m

$91

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 18 results
1
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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 August 8, 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 August 14, 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 August 10, 2025.

Travelers seeking maximum savings on their Denver to Philadelphia flight should consider departing on Tuesday 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.

Weekly flight availability from Denver to Philadelphia

Explore weekly flight availability from Denver to Philadelphia. 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 August 14, 2025.

The most flights from DEN to PHL are scheduled on a Wednesday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

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 August 14, 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
4,244 reviews

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,980 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,219 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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 21m 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 60 times in the past calendar month.

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

    Currently priced at $111, 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 $185, respectively. Users have found that Frontier is 63% cheaper than the other options available to this destination.

  • 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 Qatar Airways (74%), United Airlines (73%) or American Airlines (72%) 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 $98. On average you can expect to pay $730. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $146.

  • 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
Cherry Hill
Ocean City
Reading
Millville
Ephrata
Camden
Dewey Beach
Dover
Elkton
Essington
Willow Grove
Newark
Chester
Exton
Glen Mills
Springfield

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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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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$111Average$237FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$318FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$185Average$442FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$196Average$338FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$199Average$346FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$228Average$325FlexibilityNo cancel feeOn-time62%

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