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$77+ 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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Jan 7 — Jan 141
Wed 1/7
Wed 1/14
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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Denver Intl to Philadelphia are usually found in September or August, booked 54 days in advance, depart on a Thursday or Wednesday 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 December 8, 2025.

This Super.com deal was found by Cheapflights users on 12/6. 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.
Sat 12/139:34 amDEN - PHL
1 stop9h 05mFrontier
Mon 12/158:36 pmPHL - DEN
Nonstop4h 23mFrontier
Deal found 12/6$167
This Cheapflightsfares deal was found by Cheapflights users on 12/6. 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 12/1211:35 amDEN - PHL
1 stop10h 51mFrontier
Mon 12/158:36 pmPHL - DEN
Nonstop4h 23mFrontier
Deal found 12/6$175
This Kiwi.com deal was found by Cheapflights users on 12/7. 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 12/1511:59 pmDEN - PHL
Nonstop3h 32mFrontier
Thu 12/188:36 pmPHL - DEN
Nonstop4h 23mFrontier
Deal found 12/7$182
This Frontier deal was found by Cheapflights users on 12/6. 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.
Tue 12/1611:59 pmDEN - PHL
1 stop10h 50mFrontier
Sun 12/217:05 amPHL - DEN
1 stop15h 00mFrontier
Deal found 12/6$183
This Frontier deal was found by Cheapflights users on 12/6. 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.
Tue 12/1611:59 pmDEN - PHL
1 stop10h 50mFrontier
Thu 12/188:36 pmPHL - DEN
Nonstop4h 23mFrontier
Deal found 12/6$185
This Kiwi.com deal was found by Cheapflights users on 12/6. 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 12/1511:59 pmDEN - PHL
Nonstop3h 32mFrontier
Sun 12/217:05 amPHL - DEN
1 stop15h 00mFrontier
Deal found 12/6$189
This Kiwi.com deal was found by Cheapflights users on 12/6. 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 12/179:33 amDEN - PHL
1 stop18h 07mFrontier
Thu 12/188:36 pmPHL - DEN
Nonstop4h 23mFrontier
Deal found 12/6$192
This Cheapflightsfares deal was found by Cheapflights users on 12/8. 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 12/2511:59 pmDEN - PHL
Nonstop3h 32mFrontier
Mon 1/58:36 pmPHL - DEN
Nonstop4h 23mFrontier
Deal found 12/8$194
This Super.com deal was found by Cheapflights users on 12/7. 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 12/119:34 amDEN - PHL
1 stop9h 05mFrontier
Mon 12/158:36 pmPHL - DEN
Nonstop4h 23mFrontier
Deal found 12/7$195
This Kiwi.com deal was found by Cheapflights users on 12/6. 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 12/179:33 amDEN - PHL
1 stop18h 07mFrontier
Sun 12/217:05 amPHL - DEN
1 stop15h 00mFrontier
Deal found 12/6$196

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 December 8, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$152
(Kiwi.com)

One-way from

$77
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$409

Good round-trip deal

$258 or less

Good one-way deal

$155 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. 13% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 8, 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

Fri 5/22

10:34 pm-9:13 am

1 stop8h 39m

Philadelphia

Tue 5/26

3:15 pm-9:39 pm

1 stop8h 24m

$277

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 5/21

10:34 pm-9:13 am

1 stop8h 39m

Philadelphia

Tue 5/26

3:15 pm-9:39 pm

1 stop8h 24m

$277

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 1/7

5:55 pm-11:30 pm

Nonstop3h 35m

Philadelphia

Sun 1/18

8:09 am-10:35 am

Nonstop4h 26m

$303

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 1/6

10:15 am-3:50 pm

Nonstop3h 35m

Philadelphia

Sat 1/17

3:43 pm-6:12 pm

Nonstop4h 29m

$303

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 1/7

10:15 am-3:50 pm

Nonstop3h 35m

Philadelphia

Sat 1/17

8:09 am-10:35 am

Nonstop4h 26m

$303

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 1/10

5:55 pm-11:30 pm

Nonstop3h 35m

Philadelphia

Sun 1/18

8:09 am-10:35 am

Nonstop4h 26m

$303

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 5/20

10:34 pm-9:13 am

1 stop8h 39m

Philadelphia

Tue 5/26

3:15 pm-9:39 pm

1 stop8h 24m

$308

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 1/6

5:55 pm-11:30 pm

Nonstop3h 35m

Philadelphia

Sun 1/18

6:30 am-10:35 am

1 stop6h 05m

$313

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Mon 1/12

5:55 pm-11:30 pm

Nonstop3h 35m

Philadelphia

Wed 1/14

3:43 pm-6:12 pm

Nonstop4h 29m

$317

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Mon 3/16

10:44 pm-7:49 am

1 stop7h 05m

Philadelphia

Sun 3/22

6:00 am-12:22 pm

1 stop8h 22m

$318

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

Showing 1-10 of 21 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
MytripPrice Accuracy3 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 CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Denver-Philadelphia flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Philadelphia. Price data was last updated on December 5, 2025.

To ensure you get the cheapest price possible for a flight from Denver to Philadelphia, you should look to book at least 54 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, October is the cheapest month in which you can book a flight from Denver to Philadelphia (average of $65). Flying from Denver to Philadelphia in June is currently the most expensive (average of $149). 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 December 8, 2025.

It’s typically best to fly out from Denver to Philadelphia in the afternoon. Doing so could potentially save you 48% 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 December 6, 2025.

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

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
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

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 December 8, 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
4,254 reviews

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,254 reviews
Southwest
8.0
Very good
4,254 reviews

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,011 reviews
Southwest
8.0
Very good
4,254 reviews

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,089 reviews
Southwest
8.0
Very good
4,254 reviews

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,045 reviews
Southwest
8.0
Very good
4,254 reviews

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,085 reviews
Southwest
8.0
Very good
4,254 reviews

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 10 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 JetBlue and United Airlines fly from Denver to Philadelphia in about 3h 35m. The time it takes to get you to your destination can typically vary by up to 5h 04m. 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 $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 JetBlue and Delta - these airlines can fly you to your destination from $122 and $128, respectively. Users have found that Frontier is 64% 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 $65. Users have also found prices from $91 and $92 on American 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 Aer Lingus (92%), American Airlines (86%) or Frontier (85%) 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 $64. On average you can expect to pay $811. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $151.

  • 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, October is the cheapest month in which you can book a flight from Denver to Philadelphia (average of $65). Flying from Denver to Philadelphia in June is currently the most expensive (average of $149). 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
Pottstown
King of Prussia
Reading
Ocean City
Cherry Hill
Lewes
Dewey Beach
Ephrata
Camden
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Newark
Millville
Chester

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.
Denver to John F Kennedy Intl flights
Denver to LaGuardia flights
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Grand Junction to LaGuardia flights
Durango to Philadelphia flights
Montrose to Newark flights
Colorado Springs to State College flights
Durango to Reagan-National flights
Vail to Pittsburgh flights
Durango to Dulles Intl flights
Hayden to Dulles Intl flights
Hayden to Newark flights
Colorado Springs to Pittsburgh flights
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Montrose to Philadelphia flights
Montrose to Reagan-National flights
Montrose to John F Kennedy Intl flights
Aspen to Dulles Intl flights

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 December 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$121Average$237FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$122Average$261FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$295FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$184Average$421FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$203Average$334FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$205Average$372FlexibilityNo cancel feeOn-time63%

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