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$99+ 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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
ago 5 — ago 121
ter 8/5
ter 8/12
1 adult, Economy
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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 julho 31, 2025.

Round-trip from

$194
(Frontier)

One-way from

$99
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$282

Good round-trip deal

$234 or less

Good one-way deal

$139 or less
From Colorado to Philadelphia
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One-way flight from Colorado to Philadelphia
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Highest demand for flights based on searches. 9% potential increase in price ($33 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 July 2025
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Price to beat on a round-trip flight from Colorado to Philadelphia.
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Price to beat on a one-way flight from Colorado to Philadelphia.
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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 julho 31, 2025.

This Frontier deal was found by Cheapflights users on 7/30. 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.
qui 10/2311:15 pmDEN - PHL
Nonstop3h 34mFrontier
seg 10/276:19 amPHL - DEN
Nonstop4h 16mFrontier
Deal found 7/30$194
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 9/177:00 amDEN - PHL
Nonstop3h 36mAmerican Airlines
ter 9/237:40 pmPHL - DEN
Nonstop4h 10mAmerican Airlines
Deal found 7/29$199
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 8/2610:10 amDEN - PHL
Nonstop3h 39mUnited Airlines
ter 9/29:55 amPHL - DEN
Nonstop4h 05mUnited Airlines
Deal found 7/29$216
This American Airlines deal was found by Cheapflights users on 7/30. 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.
qua 9/174:49 pmASE - PHL
1 stop6h 21mAmerican Airlines
seg 9/295:00 amPHL - ASE
1 stop8h 42mAmerican Airlines
Deal found 7/30$217
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 8/295:30 pmDEN - PHL
Nonstop3h 35mSouthwest
qua 9/37:45 amPHL - DEN
Nonstop3h 50mSouthwest
Deal found 7/28$217
This JetBlue deal was found by Cheapflights users on 7/31. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 11/121:30 pmDEN - PHL
1 stop6h 06mJetBlue
seg 11/176:00 amPHL - DEN
1 stop8h 32mJetBlue
Deal found 7/31$229
This American Airlines deal was found by Cheapflights users on 7/30. 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.
sex 10/3112:15 pmGJT - PHL
1 stop8h 55mAmerican Airlines
sáb 11/85:00 amPHL - GJT
1 stop7h 06mAmerican Airlines
Deal found 7/30$253
This American Airlines deal was found by Cheapflights users on 7/30. 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.
sáb 10/188:08 amEGE - PHL
1 stop7h 17mAmerican Airlines
sex 10/2411:45 amPHL - EGE
2 stops9h 09mAmerican Airlines
Deal found 7/30$294
This United Airlines deal was found by Cheapflights users on 7/31. 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.
qui 10/301:30 pmEGE - PHL
2 stops8h 45mUnited Airlines
ter 11/43:48 pmPHL - EGE
1 stop6h 43mUnited Airlines
Deal found 7/31$306
This Delta deal was found by Cheapflights users on 7/31. 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.
qui 10/237:21 amASE - PHL
1 stop8h 58mDelta
qui 11/65:40 amPHL - ASE
1 stop7h 49mDelta
Deal found 7/31$314
This American Airlines deal was found by Cheapflights users on 7/30. 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.
sáb 9/272:29 pmMTJ - PHL
1 stop7h 15mAmerican Airlines
qua 10/15:00 amPHL - MTJ
1 stop7h 06mAmerican Airlines
Deal found 7/30$333
This American Airlines deal was found by Cheapflights users on 7/31. 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.
qui 9/45:16 pmCOS - PHL
1 stop5h 54mAmerican Airlines
seg 9/85:00 amPHL - COS
1 stop7h 11mAmerican Airlines
Deal found 7/31$337

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 julho 31, 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

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

qui 10/23

11:15 pm-4:49 am

Nonstop3h 34m

Philadelphia

seg 10/27

6:19 am-8:35 am

Nonstop4h 16m

$194

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

qua 9/17

7:00 am-12:36 pm

Nonstop3h 36m

Philadelphia

ter 9/23

7:40 pm-9:50 pm

Nonstop4h 10m

$199

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

ter 8/26

10:10 am-3:49 pm

Nonstop3h 39m

Philadelphia

ter 9/2

9:55 am-12:00 pm

Nonstop4h 05m

$216

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

sex 8/29

5:30 pm-11:05 pm

Nonstop3h 35m

Philadelphia

qua 9/3

7:45 am-9:35 am

Nonstop3h 50m

$217

AspenPhiladelphia

ASE - PHL

ASEPHL

Aspen Pitkin County

qua 9/17

4:49 pm-1:10 am

1 stop6h 21m

Philadelphia

seg 9/29

5:00 am-11:42 am

1 stop8h 42m

$217

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

qua 11/12

1:30 pm-9:36 pm

1 stop6h 06m

Philadelphia

seg 11/17

6:00 am-12:32 pm

1 stop8h 32m

$229

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

sex 10/31

12:15 pm-11:10 pm

1 stop8h 55m

Philadelphia

sáb 11/8

5:00 am-10:06 am

1 stop7h 06m

$253

VailPhiladelphia

EGE - PHL

EGEPHL

Vail Eagle County

sáb 10/18

8:08 am-5:25 pm

1 stop7h 17m

Philadelphia

sex 10/24

11:45 am-6:54 pm

2 stops9h 09m

$294

VailPhiladelphia

EGE - PHL

EGEPHL

Vail Eagle County

qui 10/30

1:30 pm-12:15 am

2 stops8h 45m

Philadelphia

ter 11/4

3:48 pm-8:31 pm

1 stop6h 43m

$306

AspenPhiladelphia

ASE - PHL

ASEPHL

Aspen Pitkin County

sáb 10/11

7:21 am-5:13 pm

1 stop7h 52m

Philadelphia

sáb 10/25

6:00 am-11:29 am

1 stop7h 29m

$314

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 50 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, August is the cheapest month in which you can book a flight from Colorado to Philadelphia (average of $236). Flying from Colorado 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 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 julho 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Philadelphia as you normally would.

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 julho 31, 2025.

The most flights from USCO to PHL are scheduled on a Monday (20 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

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

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 julho 31, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Colorado to Philadelphia by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
JetBlue
7.3
Good
2,914 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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 55 times in the past calendar month.

  • What are the cheapest airlines to fly from Colorado 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 $102 and $116 on Frontier 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 Qatar Airways (84%), Aer Lingus (76%) or American Airlines (76%) 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 $98. On average you can expect to pay $1,401. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $155.

  • 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, August is the cheapest month in which you can book a flight from Colorado to Philadelphia (average of $236). Flying from Colorado 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 Philadelphia?

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

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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 5 airlines flying from Colorado to Philadelphia

Discover the top 5 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 julho 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$109Average$236FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$406FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$186Average$568FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$191Average$476FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$200Average$417FlexibilityNo cancel feeOn-time63%

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