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$85+ Cheap flights from Colorado to Philadelphia (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 11/28. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Dec 15 — Dec 221
Mon 12/15
Mon 12/22
1 adult, Economy
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Find flight deals from Colorado to Philadelphia

Cheapest flights from Colorado to Philadelphia
Explore the most affordable flight options available from Colorado to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 15, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 11/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2711:15 pmDEN - PHL
Nonstop3h 30mFrontier
Mon 12/15:59 pmPHL - DEN
1 stop17h 09mFrontier
Deal found 11/14$175
This Kiwi.com deal was found by Cheapflights users on 11/14. 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.
Thu 11/2711:15 pmDEN - PHL
Nonstop3h 30mMultiple Airlines
Mon 12/18:54 pmPHL - DEN
2 stops37h 33mMultiple Airlines
Deal found 11/14$176
This Kiwi.com deal was found by Cheapflights users on 11/14. 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.
Tue 12/99:00 pmDEN - PHL
2 stops15h 44mMultiple Airlines
Thu 12/116:00 amPHL - DEN
1 stop16h 40mMultiple Airlines
Deal found 11/14$179
This Kiwi.com deal was found by Cheapflights users on 11/14. 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.
Fri 12/511:59 pmDEN - PHL
Nonstop3h 32mFrontier
Sun 12/710:00 pmPHL - DEN
2 stops31h 58mFrontier
Deal found 11/14$180
This Kiwi.com deal was found by Cheapflights users on 11/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/288:31 amDEN - PHL
1 stop8h 15mMultiple Airlines
Tue 12/28:54 pmPHL - DEN
2 stops23h 28mMultiple Airlines
Deal found 11/13$181
This Cheapflightsfares deal was found by Cheapflights users on 11/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/266:08 pmDEN - PHL
1 stop11h 24mFrontier
Tue 12/26:00 amPHL - DEN
Nonstop4h 23mFrontier
Deal found 11/14$182
This Cheapflightsfares deal was found by Cheapflights users on 11/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2411:15 pmDEN - PHL
Nonstop3h 30mFrontier
Sun 12/76:00 amPHL - DEN
1 stop15h 45mFrontier
Deal found 11/13$183
This Expedia deal was found by Cheapflights users on 11/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/711:35 amDEN - PHL
1 stop10h 51mFrontier
Wed 12/104:00 pmPHL - DEN
1 stop9h 04mFrontier
Deal found 11/13$184
This Kiwi.com deal was found by Cheapflights users on 11/12. 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.
Fri 11/216:50 amDEN - PHL
1 stop15h 09mFrontier
Wed 11/266:00 amPHL - DEN
Nonstop4h 25mFrontier
Deal found 11/12$185
This Kiwi.com deal was found by Cheapflights users on 11/14. 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 12/312:59 amDEN - PHL
1 stop8h 19mFrontier
Sun 12/77:11 pmPHL - DEN
2 stops15h 59mFrontier
Deal found 11/14$186
This American Airlines deal was found by Cheapflights users on 11/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/52:09 pmGJT - PHL
1 stop7h 39mAmerican Airlines
Thu 12/113:58 pmPHL - GJT
1 stop9h 01mAmerican Airlines
Deal found 11/14$249
This Delta deal was found by Cheapflights users on 11/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/135:50 amGJT - PHL
2 stops10h 11mDelta
Tue 12/1612:22 pmPHL - GJT
2 stops12h 25mDelta
Deal found 11/13$259

Cheap flight deals from Colorado to Philadelphia

Keep the following information in mind while searching for Colorado to Philadelphia flight deals. Data was last updated November 15, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$175
(Cheapflightsfares)

One-way from

$85
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$384

Good round-trip deal

$250 or less

Good one-way deal

$135 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 Colorado to Philadelphia
Search Deals
One-way flight from Colorado to Philadelphia
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Colorado to Philadelphia.
Search Deals
Price to beat on a one-way flight from Colorado to Philadelphia.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado 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 November 15, 2025.
Use the filters below to find and compare flights from Colorado to Philadelphia that are best for you.

Fly from

Colorado

Fly to

Philadelphia

Route

Depart

Return

Price

MontrosePhiladelphia

MTJ - PHL

MTJPHL

Montrose County

Thu 1/15

3:28 pm-11:32 pm

1 stop6h 04m

Philadelphia

Mon 1/19

8:09 am-12:30 pm

1 stop6h 21m

$237

MontrosePhiladelphia

MTJ - PHL

MTJPHL

Montrose County

Fri 1/16

3:28 pm-11:30 pm

1 stop6h 02m

Philadelphia

Mon 1/19

8:09 am-2:32 pm

1 stop8h 23m

$237

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

Fri 12/5

2:09 pm-11:48 pm

1 stop7h 39m

Philadelphia

Thu 12/11

3:58 pm-10:59 pm

1 stop9h 01m

$249

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 1/23

10:50 am-4:20 pm

Nonstop3h 30m

Philadelphia

Sat 1/31

2:05 pm-4:25 pm

Nonstop4h 20m

$253

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Mon 12/1

12:50 am-9:27 am

1 stop6h 37m

Philadelphia

Tue 12/9

11:46 am-3:39 pm

1 stop5h 53m

$254

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

Sat 12/13

5:50 am-6:01 pm

2 stops10h 11m

Philadelphia

Tue 12/16

12:22 pm-10:47 pm

2 stops12h 25m

$259

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 12/3

5:50 pm-11:22 pm

Nonstop3h 32m

Philadelphia

Sat 12/6

3:35 pm-5:55 pm

Nonstop4h 20m

$259

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 1/23

12:05 pm-8:20 pm

1 stop6h 15m

Philadelphia

Sat 1/24

2:05 pm-4:25 pm

Nonstop4h 20m

$263

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 1/22

12:30 am-11:11 am

1 stop8h 41m

Philadelphia

Sat 1/24

2:30 pm-9:16 pm

1 stop8h 46m

$273

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 12/6

9:30 am-7:45 pm

2 stops8h 15m

Philadelphia

Mon 12/8

6:00 am-11:15 am

2 stops7h 15m

$298

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/14

Showing 1-10 of 60 results
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Best time to book a flight from Colorado to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Colorado 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 Colorado to Philadelphia

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

Currently, October is the cheapest month in which you can book a flight from Colorado to Philadelphia (average of $65). Flying from Colorado to Philadelphia in June is currently the most expensive (average of $152). 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 CO to PHL?

Find hourly flight availability from Colorado 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 November 15, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 29% on flights from Colorado to Philadelphia by exploring options for tickets in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Colorado to Philadelphia. Price data was last updated on December 16, 2024.

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

Weekly flight availability from Colorado to Philadelphia

Explore weekly flight availability from Colorado 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 November 15, 2025.

The most flights from USCO to PHL are scheduled on a Thursday (16 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

Related info for your journey

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

  • What airport do you fly into for flights to Philadelphia from Colorado?

    For a flight from Colorado to Philadelphia, you will be flying into Philadelphia. Philadelphia (PHL) is just 7.0 mi from the center of the city.

  • How popular is this Colorado to Philadelphia flight route?

    Flights from Colorado to Philadelphia have been viewed 70 times in the past calendar month.

  • How long is the flight from Colorado to Philadelphia?

    United Airlines, American Airlines, and Southwest can get you from Colorado to Philadelphia in just under 3h 30m. Your travel time can differ by up to 4h 09m. There are 1553 mi between Colorado and Philadelphia. Both multi-stop and nonstop flights can be found to your destination and back.

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

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $90. Users have also found prices from $94 and $111 on United Airlines and American Airlines, respectively.

  • What are the most popular routes from Colorado to Philadelphia?

    Most travelers choose Denver Intl - Philadelphia, Colorado Springs - Philadelphia or Durango La Plata County - Philadelphia when deciding on the best route from Colorado to Philadelphia.

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

    Consider Aer Lingus (90%), American Airlines (86%) or Frontier (83%) when booking your flight. These represent the most reliable airlines when flying from Colorado to Philadelphia.

  • What are the cheapest flights from Colorado to Philadelphia?

    The cheapest flight price from Colorado to Philadelphia is $79. On average you can expect to pay $503. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $121.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Colorado to Philadelphia (average of $65). Flying from Colorado to Philadelphia in June is currently the most expensive (average of $152). 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
Pottstown
Reading
Ocean City
Cherry Hill
Dewey Beach
Ephrata
Camden
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Newark
Millville
Chester
Exton

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Colorado 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 Colorado to Philadelphia

Discover the top 6 airlines that operate flights from Colorado 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 November 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$122Average$261FlexibilityNo cancel feeOn-time62%
FrontierCheapest$123Average$238FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$361FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$189Average$547FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$200Average$460FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$201Average$425FlexibilityNo cancel feeOn-time63%

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