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$136+ 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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Jul 31 — Aug 71
Fri 7/31
Fri 8/7
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 July 1, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/27. 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 7/2411:59 pm
DEN
-
PHL
1 stop6h 40m
Frontier
Wed 7/298:30 am
PHL
-
DEN
1 stop7h 30m
Frontier
Deal found 6/27$270
This Kiwi.com deal was found by Cheapflights users on 6/28. 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.
Sat 10/1010:30 am
DEN
-
PHL
1 stop10h 51m
Frontier
Sat 10/177:10 am
PHL
-
DEN
1 stop8h 50m
Frontier
Deal found 6/28$271
This Cheapflightsfares deal was found by Cheapflights users on 6/28. 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 8/136:05 am
DEN
-
PHL
Nonstop3h 44m
Frontier
Sun 8/168:37 pm
PHL
-
DEN
Nonstop4h 27m
Frontier
Deal found 6/28$273
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 7/249:58 am
DEN
-
PHL
1 stop20h 41m
Frontier
Tue 7/2812:44 pm
PHL
-
DEN
Nonstop4h 14m
Frontier
Deal found 6/27$274
This Frontier deal was found by Cheapflights users on 6/28. 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 10/811:59 pm
DEN
-
PHL
Nonstop3h 37m
Frontier
Tue 10/138:44 pm
PHL
-
DEN
Nonstop4h 20m
Frontier
Deal found 6/28$275
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 9/3010:59 am
DEN
-
PHL
2 stops10h 12m
Frontier
Wed 10/712:43 pm
PHL
-
DEN
1 stop11h 50m
Frontier
Deal found 6/28$276
This Super.com deal was found by Cheapflights users on 6/29. 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 7/256:05 am
DEN
-
PHL
Nonstop3h 44m
Frontier
Sun 8/212:44 pm
PHL
-
DEN
Nonstop4h 14m
Frontier
Deal found 6/29$277
This Super.com deal was found by Cheapflights users on 6/28. 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.
Wed 7/226:05 am
DEN
-
PHL
Nonstop3h 44m
Frontier
Sun 8/212:44 pm
PHL
-
DEN
Nonstop4h 14m
Frontier
Deal found 6/28$278
This Kiwi.com deal was found by Cheapflights users on 6/27. 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.
Sat 7/256:05 am
DEN
-
PHL
Nonstop3h 44m
Frontier
Thu 8/612:44 pm
PHL
-
DEN
Nonstop4h 14m
Frontier
Deal found 6/27$280
This CheapOair deal was found by Cheapflights users on 6/28. 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.
Thu 10/158:10 am
DEN
-
PHL
1 stop5h 25m
Multiple Airlines
Wed 10/2110:45 am
PHL
-
DEN
1 stop8h 15m
Multiple Airlines
Deal found 6/28$281
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 9/2810:10 am
COS
-
PHL
2 stops25h 02m
Multiple Airlines
Thu 10/86:06 pm
PHL
-
COS
1 stop24h 49m
Multiple Airlines
Deal found 6/28$291
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 9/2810:10 am
COS
-
PHL
2 stops25h 02m
Multiple Airlines
Fri 10/96:00 am
PHL
-
COS
1 stop12h 55m
Multiple Airlines
Deal found 6/28$295

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 July 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$270
(Kiwi.com)

One-way from

$136
(Super.com)

Popular in

June

Cheapest in

February

Average price

$354

Good round-trip deal

$330 or less

Good one-way deal

$188 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. 14% potential increase in price ($59 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 1, 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

VailPhiladelphia

EGE - PHL

EGEPHL

Vail Eagle County

Fri 9/11

8:00 am-5:57 pm

1 stop7h 57m

Philadelphia

Tue 9/15

5:00 am-12:17 pm

1 stop9h 17m

$311

Colorado SpringsPhiladelphia

COS - PHL

COSPHL

Colorado Springs

Sat 9/5

6:30 am-4:11 pm

1 stop7h 41m

Philadelphia

Wed 9/9

12:29 pm-7:56 pm

2 stops9h 27m

$338

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

Sat 9/12

1:40 pm-11:44 pm

1 stop8h 04m

Philadelphia

Sat 9/19

3:48 pm-8:35 pm

1 stop6h 47m

$351

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

Sat 9/12

12:01 pm-9:06 pm

1 stop7h 05m

Philadelphia

Sat 9/19

1:00 pm-6:22 pm

1 stop7h 22m

$351

DurangoPhiladelphia

DRO - PHL

DROPHL

Durango La Plata County

Thu 8/20

12:40 pm-9:03 pm

1 stop6h 23m

Philadelphia

Mon 8/24

12:57 pm-7:58 pm

1 stop9h 01m

$358

Colorado SpringsPhiladelphia

COS - PHL

COSPHL

Colorado Springs

Mon 8/17

11:27 am-1:19 am

2 stops11h 52m

Philadelphia

Wed 8/19

9:40 am-9:38 pm

2 stops13h 58m

$361

MontrosePhiladelphia

MTJ - PHL

MTJPHL

Montrose County

Thu 8/13

9:10 am-10:15 pm

2 stops11h 05m

Philadelphia

Tue 8/18

12:35 pm-7:25 pm

1 stop8h 50m

$367

Colorado SpringsPhiladelphia

COS - PHL

COSPHL

Colorado Springs

Wed 9/30

6:00 am-2:45 pm

1 stop6h 45m

Philadelphia

Mon 10/19

5:25 am-12:25 pm

1 stop9h 00m

$369

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

Thu 8/20

1:40 pm-12:59 am

2 stops9h 19m

Philadelphia

Mon 8/24

10:05 am-2:37 pm

1 stop6h 32m

$374

Colorado SpringsPhiladelphia

COS - PHL

COSPHL

Colorado Springs

Sat 7/25

6:50 am-5:39 pm

1 stop8h 49m

Philadelphia

Wed 7/29

5:40 am-10:27 am

1 stop6h 47m

$376

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 60 resultsSorted by cheapest first
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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, April is the cheapest month in which you can book a flight from Colorado to Philadelphia (average of $58). Flying from Colorado to Philadelphia in July is currently the most expensive (average of $730). 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 July 1, 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 41% on flights from Colorado to Philadelphia by exploring options for tickets in the evening.

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 July 1, 2026.

The most flights from USCO to PHL are scheduled on a Wednesday (20 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

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

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

Booking 40 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 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 June 27, 2026.

Travelers seeking maximum savings on their Colorado to Philadelphia flight should consider departing on Wednesday 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.

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 79 times in the past calendar month.

  • How long is the flight from Colorado to Philadelphia?

    American Airlines, United Airlines, and Southwest can get you from Colorado to Philadelphia in just under 7h 57m. Your travel time can differ by up to 3h 08m. There are 1673 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 $65. Users have also found prices from $98 and $101 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 Aer Lingus (83%), British Airways (83%) or Frontier (82%) 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 $128. On average you can expect to pay $871. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $199.

  • 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, April is the cheapest month in which you can book a flight from Colorado to Philadelphia (average of $58). Flying from Colorado to Philadelphia in July is currently the most expensive (average of $730). 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
Plymouth Meeting
Cherry Hill
Lewes
Wyomissing
Dewey Beach
Pottstown
Ephrata
Milford
Wildwood Crest
Dover
Elkton
Essington
Willow Grove
New Castle
Millville

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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 July 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$119Average$267FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$122Average$290FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$365FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$139Average$442FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$199Average$462FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$216Average$480FlexibilityNo cancel feeOn-time63%

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