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$99+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Philadelphia are usually found in September or October, booked 55 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 June 12, 2025.

Round-trip from

$176
(Cheapflightsfares)

One-way from

$99
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$306

Good round-trip deal

$206 or less

Good one-way deal

$129 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. 10% potential increase in price ($35 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 June 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 June 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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.
Tue 7/1511:30 pmDEN - PHL
Nonstop3h 39mFrontier
Tue 7/226:15 amPHL - DEN
Nonstop4h 13mFrontier
Deal found 6/12$176
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 8/238:53 amDEN - PHL
Nonstop3h 41mAmerican Airlines
Wed 8/278:40 amPHL - DEN
Nonstop4h 00mAmerican Airlines
Deal found 6/11$197
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/154:00 pmDEN - PHL
1 stop5h 50mDelta
Wed 8/206:25 pmPHL - DEN
1 stop6h 30mDelta
Deal found 6/12$257
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/47:45 amDEN - PHL
2 stops9h 00mSouthwest
Tue 7/87:30 pmPHL - DEN
1 stop6h 10mSouthwest
Deal found 6/11$302
This United Airlines deal was found by Cheapflights users on 6/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1111:59 pmDEN - PHL
Nonstop3h 38mUnited Airlines
Wed 8/209:55 amPHL - DEN
Nonstop4h 07mUnited Airlines
Deal found 6/12$307
This Priceline deal was found by Cheapflights users on 6/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1911:15 pmDEN - PHL
Nonstop3h 34mMultiple Airlines
Sun 11/2310:00 amPHL - DEN
1 stop9h 17mMultiple Airlines
Deal found 6/11$313

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 June 12, 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

Tue 7/15

11:30 pm-5:09 am

Nonstop3h 39m

Philadelphia

Tue 7/22

6:15 am-8:28 am

Nonstop4h 13m

$176

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 8/23

8:53 am-2:34 pm

Nonstop3h 41m

Philadelphia

Wed 8/27

8:40 am-10:40 am

Nonstop4h 00m

$197

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 8/15

12:10 pm-10:20 pm

1 stop8h 10m

Philadelphia

Mon 8/18

6:59 pm-11:09 pm

1 stop6h 10m

$257

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 7/4

7:45 am-6:45 pm

2 stops9h 00m

Philadelphia

Tue 7/8

7:30 pm-11:40 pm

1 stop6h 10m

$302

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Mon 8/11

11:59 pm-5:37 am

Nonstop3h 38m

Philadelphia

Wed 8/20

9:55 am-12:02 pm

Nonstop4h 07m

$307

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 11/19

11:15 pm-4:49 am

Nonstop3h 34m

Philadelphia

Sun 11/23

10:00 am-5:17 pm

1 stop9h 17m

$313

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 8/13

11:59 pm-5:37 am

Nonstop3h 38m

$99

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sun 9/21

12:59 am-11:02 am

1 stop8h 03m

$116

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 10/24

7:25 am-12:55 pm

Nonstop3h 30m

$120

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 7/26

10:39 pm-9:38 am

1 stop8h 59m

$125

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 15 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 June 9, 2025.

To ensure you get the cheapest price possible for a flight from Denver to Philadelphia, you should look to book at least 55 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 June 12, 2025.

It’s typically best to fly out from Denver to Philadelphia in the evening. Doing so could potentially save you 54% 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 June 8, 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 June 12, 2025.

The most flights from DEN to PHL are scheduled on a Wednesday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

Temperature in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Philadelphia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

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 June 12, 2025.
See what other customers who have flown with Southwest, Delta and United Airlines from Denver to Philadelphia have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,946 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
JetBlue
7.3
Good
2,925 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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 25m for a nonstop flight. There are 14 flights from Denver Intl to Philadelphia per day from 5 airlines.

  • How popular is this Denver to Philadelphia flight route?

    Flights from Denver Intl to Philadelphia have been viewed 62 times in the past calendar month.

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

    Currently priced at $176, 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 American Airlines and Delta - these airlines can fly you to your destination from $197 and $257, respectively. Users have found that Frontier is 41% 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 United Airlines. According to our data, you can fly for as low as $99. Users have also found prices from $118 and $125 on Frontier and JetBlue, 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 British Airways (100%), Qatar Airways (89%) or Aer Lingus (87%) 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 $94. On average you can expect to pay $1,847. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $181.

  • 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 Denver?

Book flights to Denver if you plan to visit one of these locations
Vineland
Wildwood
Pottstown
King of Prussia
Cherry Hill
Exton
Ocean City
Chester
Essington
Reading
Newark
Middletown
Millville
Ephrata
Camden
Dover
Elkton
Willow Grove
Glen Mills
Springfield

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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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Durango to Philadelphia flights
Vail to Reagan-National flights
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Top 5 airlines flying from Denver to Philadelphia

Discover the top 5 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$91Average$226FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$297FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$188Average$437FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$188Average$338FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$199Average$355FlexibilityNo cancel feeOn-time63%

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