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$105+ 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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
1 adult, Economy
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Cheap 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 February 11, 2026.

This deal was found by Cheapflights users on 2/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/212:59 am
DEN
-
PHL
1 stop7h 28m
Frontier
Mon 3/98:33 pm
PHL
-
DEN
Nonstop4h 39m
Frontier
Deal found 2/9$146
This Cheapflightsfares deal was found by Cheapflights users on 2/9. 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 2/2712:25 pm
DEN
-
PHL
Nonstop3h 30m
Frontier
Tue 3/311:40 am
PHL
-
DEN
1 stop12h 01m
Frontier
Deal found 2/9$147
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1311:59 pm
DEN
-
PHL
Nonstop3h 35m
Frontier
Wed 5/208:25 pm
PHL
-
DEN
Nonstop4h 28m
Frontier
Deal found 2/11$149
This Expedia deal was found by Cheapflights users on 2/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:00 am
DEN
-
PHL
1 stop6h 35m
Frontier
Mon 3/21:02 pm
PHL
-
DEN
1 stop8h 25m
Frontier
Deal found 2/11$150
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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 4/1511:59 pm
DEN
-
PHL
Nonstop3h 35m
Frontier
Sun 4/198:25 pm
PHL
-
DEN
Nonstop4h 28m
Frontier
Deal found 2/10$151
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1011:59 pm
DEN
-
PHL
Nonstop3h 35m
Frontier
Mon 5/1810:38 pm
PHL
-
DEN
1 stop17h 54m
Frontier
Deal found 2/8$152
This Super.com deal was found by Cheapflights users on 2/9. 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.
Mon 3/911:59 pm
DEN
-
PHL
Nonstop3h 32m
Frontier
Mon 3/168:25 pm
PHL
-
DEN
Nonstop4h 39m
Frontier
Deal found 2/9$154
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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 3/611:59 pm
DEN
-
PHL
Nonstop3h 32m
Frontier
Mon 3/98:33 pm
PHL
-
DEN
Nonstop4h 39m
Frontier
Deal found 2/10$155
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 3/1011:59 pm
DEN
-
PHL
1 stop9h 00m
Frontier
Tue 3/176:12 pm
PHL
-
DEN
1 stop16h 14m
Frontier
Deal found 2/10$156
This Cheapflightsfares deal was found by Cheapflights users on 2/9. 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 3/412:05 pm
DEN
-
PHL
1 stop28h 34m
Frontier
Fri 3/68:25 pm
PHL
-
DEN
Nonstop4h 39m
Frontier
Deal found 2/9$157
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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 5/111:59 pm
DEN
-
PHL
Nonstop3h 35m
Frontier
Mon 5/43:41 pm
PHL
-
DEN
1 stop9h 10m
Frontier
Deal found 2/10$158
This Priceline deal was found by Cheapflights users on 2/9. 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.
Fri 4/1711:59 pm
DEN
-
PHL
1 stop10h 48m
Frontier
Mon 4/208:25 pm
PHL
-
DEN
Nonstop4h 28m
Frontier
Deal found 2/9$159

Find flight deals from Colorado to Philadelphia

Keep the following information in mind while searching for Colorado to Philadelphia flight deals. Data was last updated February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$146

One-way from

$105
(Kiwi.com)

Popular in

November

Cheapest in

August

Average price

$275

Good round-trip deal

$258 or less

Good one-way deal

$176 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. 9% potential increase in price ($30 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 February 11, 2026.
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

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 5/14

8:00 am-1:17 pm

2 stops27h 17m

Philadelphia

Tue 5/19

5:45 am-12:09 pm

1 stop8h 24m

$210

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 5/1

1:55 pm-7:37 pm

Nonstop3h 42m

Philadelphia

Wed 5/6

9:55 am-12:16 pm

Nonstop4h 21m

$217

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 3/10

5:57 pm-11:32 pm

Nonstop3h 35m

Philadelphia

Tue 3/17

3:30 pm-6:00 pm

Nonstop4h 30m

$229

MontrosePhiladelphia

MTJ - PHL

MTJPHL

Montrose County

Mon 3/2

2:13 pm-12:24 am

1 stop8h 11m

Philadelphia

Sun 3/8

5:40 am-12:49 pm

1 stop9h 09m

$249

HaydenPhiladelphia

HDN - PHL

HDNPHL

Hayden Yampa Valley

Tue 3/17

12:01 pm-9:09 pm

1 stop7h 08m

Philadelphia

Wed 3/18

12:10 pm-8:41 pm

2 stops10h 31m

$254

HaydenPhiladelphia

HDN - PHL

HDNPHL

Hayden Yampa Valley

Tue 3/17

2:05 pm-12:57 am

1 stop8h 52m

Philadelphia

Wed 3/18

6:54 am-1:00 pm

1 stop8h 06m

$259

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 3/12

7:30 pm-12:55 am

Nonstop3h 25m

Philadelphia

Wed 3/25

5:30 am-7:40 am

Nonstop4h 10m

$261

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 3/13

7:30 pm-12:55 am

Nonstop3h 25m

Philadelphia

Tue 3/17

5:30 am-7:40 am

Nonstop4h 10m

$261

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 3/13

12:35 am-8:46 am

1 stop6h 11m

Philadelphia

Wed 3/18

6:54 pm-11:39 pm

1 stop6h 45m

$278

DurangoPhiladelphia

DRO - PHL

DROPHL

Durango La Plata County

Tue 4/14

7:00 am-3:47 pm

1 stop6h 47m

Philadelphia

Sat 4/25

3:40 pm-8:54 pm

1 stop7h 14m

$278

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

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 July is currently the most expensive (average of $154). 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 February 11, 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 47% on flights from Colorado to Philadelphia by exploring options for tickets in the afternoon.

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 February 7, 2026.

Travelers seeking maximum savings on their Colorado 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.

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 83 times in the past calendar month.

  • How long is the flight from Colorado to Philadelphia?

    United Airlines, Delta, and Southwest can get you from Colorado to Philadelphia in just under 3h 25m. Your travel time can differ by up to 3h 03m. 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 Frontier. According to our data, you can fly for as low as $64. Users have also found prices from $94 and $94 on Southwest and American Airlines, respectively.

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

    Most travelers choose Denver Intl - Philadelphia, Colorado Springs - Philadelphia or Grand Junction Regnl - Philadelphia when deciding on the best route from Colorado to Philadelphia.

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

    Consider United Airlines (89%), Air Canada (84%) or Aer Lingus (77%) 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 $105. On average you can expect to pay $749. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $126.

  • 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 July is currently the most expensive (average of $154). 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
Reading
Ocean City
King of Prussia
Cherry Hill
Lewes
Dewey Beach
Ephrata
Camden
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Newark

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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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$111Average$227FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$122Average$220FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$363FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$139Average$433FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$178Average$476FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$210Average$432FlexibilityNo cancel feeOn-time63%

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