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$100+ 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 7/29. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Jun 9 — Jun 161
Tue 6/9
Tue 6/16
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 May 10, 2026.

This Frontier deal was found by Cheapflights users on 5/5. 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.
Sun 7/1210:39 pm
DEN
-
PHL
1 stop8h 42m
Frontier
Mon 7/1312:44 pm
PHL
-
DEN
Nonstop4h 14m
Frontier
Deal found 5/5$181
This Cheapflightsfares deal was found by Cheapflights users on 5/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2911:59 pm
DEN
-
PHL
Nonstop3h 38m
Frontier
Mon 6/87:00 am
PHL
-
DEN
1 stop14h 29m
Frontier
Deal found 5/7$182
This Frontier deal was found by Cheapflights users on 5/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:05 am
DEN
-
PHL
Nonstop3h 42m
Frontier
Sat 7/113:50 pm
PHL
-
DEN
1 stop10h 08m
Frontier
Deal found 5/10$183
This Frontier deal was found by Cheapflights users on 5/5. 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 6/1211:59 pm
DEN
-
PHL
Nonstop3h 39m
Frontier
Sat 6/1311:00 am
PHL
-
DEN
1 stop12h 42m
Frontier
Deal found 5/5$186
This Cheapflightsfares deal was found by Cheapflights users on 5/6. 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.
Sat 6/206:00 am
DEN
-
PHL
1 stop7h 41m
Frontier
Sat 7/412:42 pm
PHL
-
DEN
Nonstop4h 14m
Frontier
Deal found 5/6$188
This Frontier deal was found by Cheapflights users on 5/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:05 am
DEN
-
PHL
Nonstop3h 42m
Frontier
Fri 7/178:25 am
PHL
-
DEN
1 stop8h 10m
Frontier
Deal found 5/10$189
This Frontier deal was found by Cheapflights users on 5/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/2511:59 pm
DEN
-
PHL
1 stop23h 18m
Frontier
Fri 7/38:37 pm
PHL
-
DEN
Nonstop4h 22m
Frontier
Deal found 5/9$190
This Super.com deal was found by Cheapflights users on 5/7. 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.
Fri 5/2911:59 pm
DEN
-
PHL
Nonstop3h 38m
Frontier
Tue 6/28:35 pm
PHL
-
DEN
Nonstop4h 29m
Frontier
Deal found 5/7$191
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 5/2411:59 pm
DEN
-
PHL
Nonstop3h 38m
Frontier
Sat 5/307:20 am
PHL
-
DEN
1 stop9h 12m
Frontier
Deal found 5/5$193
This CheapOair deal was found by Cheapflights users on 5/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:29 pm
DEN
-
PHL
1 stop29h 51m
Frontier
Sun 8/2312:42 pm
PHL
-
DEN
Nonstop4h 14m
Frontier
Deal found 5/8$196
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Tue 5/2611:56 pm
DEN
-
PHL
1 stop7h 03m
Frontier
Thu 5/288:35 pm
PHL
-
DEN
Nonstop4h 29m
Frontier
Deal found 5/6$197
This Cheapflightsfares deal was found by Cheapflights users on 5/6. 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 5/227:00 am
DEN
-
PHL
1 stop9h 16m
Frontier
Wed 5/278:35 pm
PHL
-
DEN
Nonstop4h 29m
Frontier
Deal found 5/6$198

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 May 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$181
(Frontier)

One-way from

$100
(eDestinos)

Popular in

November

Cheapest in

February

Average price

$352

Good round-trip deal

$309 or less

Good one-way deal

$177 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. 6% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 10, 2026.
Use the filters below to find and compare flights from Colorado to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

Sat 5/30

6:55 pm-5:34 am

1 stop8h 39m

Philadelphia

Sat 6/6

10:50 am-6:25 pm

1 stop9h 35m

$329

Colorado SpringsPhiladelphia

COS - PHL

COSPHL

Colorado Springs

Wed 5/27

1:55 pm-10:12 pm

1 stop6h 17m

Philadelphia

Sat 5/30

12:38 pm-10:22 pm

2 stops11h 44m

$346

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sun 5/24

7:15 am-3:45 pm

2 stops6h 30m

Philadelphia

Thu 5/28

2:15 pm-7:20 pm

2 stops7h 05m

$369

MontrosePhiladelphia

MTJ - PHL

MTJPHL

Montrose County

Fri 6/5

2:22 pm-10:53 pm

1 stop6h 31m

Philadelphia

Mon 6/8

7:08 am-1:29 pm

1 stop8h 21m

$371

Colorado SpringsPhiladelphia

COS - PHL

COSPHL

Colorado Springs

Sat 6/27

9:55 am-12:05 am

1 stop12h 10m

Philadelphia

Fri 7/3

8:00 am-2:00 pm

1 stop8h 00m

$371

HaydenPhiladelphia

HDN - PHL

HDNPHL

Hayden Yampa Valley

Thu 6/4

1:20 pm-12:59 am

2 stops9h 39m

Philadelphia

Mon 6/8

4:14 pm-8:07 pm

1 stop5h 53m

$375

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

Thu 9/10

12:59 pm-12:19 am

1 stop9h 20m

Philadelphia

Mon 9/14

4:17 pm-12:16 am

1 stop9h 59m

$384

MontrosePhiladelphia

MTJ - PHL

MTJPHL

Montrose County

Sat 8/29

12:40 pm-9:27 pm

1 stop6h 47m

Philadelphia

Tue 9/1

6:16 am-11:15 am

1 stop6h 59m

$409

HaydenPhiladelphia

HDN - PHL

HDNPHL

Hayden Yampa Valley

Sat 8/29

1:29 pm-12:50 am

2 stops9h 21m

Philadelphia

Tue 9/1

10:00 am-2:38 pm

1 stop6h 38m

$414

AspenPhiladelphia

ASE - PHL

ASEPHL

Aspen Pitkin County

Thu 8/27

1:56 pm-11:59 pm

1 stop8h 03m

Philadelphia

Sat 9/5

5:00 am-10:01 am

1 stop7h 01m

$417

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/6

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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

How far ahead should I book a flight from Colorado to Philadelphia?

Booking 42 days in advance of your planned departure date is, on average, the best time to get cheap flights from Colorado to Philadelphia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, November is the cheapest month in which you can book a flight from Colorado to Philadelphia (average of $59). Flying from Colorado to Philadelphia in May is currently the most expensive (average of $663). 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 May 10, 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 45% 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 May 9, 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. Sunday at noon 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 May 10, 2026.

The most flights from USCO to PHL are scheduled on a Saturday (19 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (14 on average).

How much does it cost to fly round-trip from Colorado to Philadelphia?

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 73 times in the past calendar month.

  • How long is the flight from Colorado to Philadelphia?

    Southwest, American Airlines, and Delta can get you from Colorado to Philadelphia in just under 6h 17m. Your travel time can differ by up to 2h 22m. There are 1568 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 $67. Users have also found prices from $94 and $99 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 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 United Airlines (90%), Air Canada (88%) or Aer Lingus (88%) 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 $109. On average you can expect to pay $840. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $200.

  • 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, November is the cheapest month in which you can book a flight from Colorado to Philadelphia (average of $59). Flying from Colorado to Philadelphia in May is currently the most expensive (average of $663). 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
Reading
Camden
Ocean City
Lewes
Dewey Beach
Pottstown
Vineland
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Chester
Newark

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 May 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$111Average$228FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$122Average$290FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$329FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$139Average$427FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$192Average$456FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$217Average$442FlexibilityNo cancel feeOn-time63%

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