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$97+ 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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
jul. 6 — jul. 131
dom. 7/6
dom. 7/13
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 julio 1, 2025.

Round-trip from

$171
(Priceline)

One-way from

$97
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$273

Good round-trip deal

$242 or less

Good one-way deal

$153 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. 10% potential increase in price ($34 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 julio 1, 2025.

This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/1511:30 pmDEN - PHL
Nonstop3h 39mFrontier
dom. 8/176:00 amPHL - DEN
1 stop8h 57mFrontier
Deal found 6/29$171
This United Airlines deal was found by Cheapflights users on 7/1. 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.
mié. 8/2011:59 pmDEN - PHL
Nonstop3h 36mUnited Airlines
dom. 8/248:00 amPHL - DEN
Nonstop4h 04mUnited Airlines
Deal found 7/1$217
This American Airlines deal was found by Cheapflights users on 6/30. 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.
vie. 10/34:49 pmASE - PHL
1 stop6h 21mAmerican Airlines
dom. 10/55:00 amPHL - ASE
1 stop8h 44mAmerican Airlines
Deal found 6/30$253
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/133:18 pmGJT - PHL
1 stop5h 59mUnited Airlines
mar. 12/163:40 pmPHL - GJT
1 stop8h 31mUnited Airlines
Deal found 6/29$343
This American Airlines deal was found by Cheapflights users on 6/30. 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.
jue. 8/2812:07 pmCOS - PHL
1 stop10h 17mAmerican Airlines
dom. 8/316:45 pmPHL - COS
1 stop6h 59mAmerican Airlines
Deal found 6/30$352
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/66:00 amCOS - PHL
1 stop7h 00mDelta
lun. 8/118:00 amPHL - COS
1 stop6h 12mDelta
Deal found 6/30$357
This United Airlines deal was found by Cheapflights users on 6/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/141:30 pmASE - PHL
2 stops9h 00mUnited Airlines
sáb. 8/165:16 pmPHL - ASE
1 stop6h 28mUnited Airlines
Deal found 6/30$363
This American Airlines deal was found by Cheapflights users on 7/1. 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.
mié. 7/162:38 pmEGE - PHL
1 stop8h 21mAmerican Airlines
dom. 7/205:00 amPHL - EGE
1 stop6h 42mAmerican Airlines
Deal found 7/1$369
This Southwest deal was found by Cheapflights users on 6/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/289:45 amCOS - PHL
1 stop6h 10mSouthwest
dom. 8/317:35 amPHL - COS
2 stops8h 50mSouthwest
Deal found 6/30$372
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/2011:52 amDRO - PHL
1 stop9h 31mAmerican Airlines
lun. 8/256:38 amPHL - DRO
1 stop7h 27mAmerican Airlines
Deal found 6/29$378
This United Airlines deal was found by Cheapflights users on 7/1. 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.
mar. 8/51:01 pmHDN - PHL
1 stop8h 18mUnited Airlines
vie. 8/158:00 amPHL - HDN
1 stop8h 26mUnited Airlines
Deal found 7/1$389
This American Airlines deal was found by Cheapflights users on 6/30. 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.
jue. 7/104:31 pmGJT - PHL
1 stop6h 28mAmerican Airlines
mar. 7/157:00 pmPHL - GJT
1 stop7h 17mAmerican Airlines
Deal found 6/30$394

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 julio 1, 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

vie. 8/15

11:30 pm-5:09 am

Nonstop3h 39m

Philadelphia

dom. 8/17

6:00 am-12:57 pm

1 stop8h 57m

$171

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

mié. 8/20

11:59 pm-5:35 am

Nonstop3h 36m

Philadelphia

dom. 8/24

8:00 am-10:04 am

Nonstop4h 04m

$217

AspenPhiladelphia

ASE - PHL

ASEPHL

Aspen Pitkin County

vie. 10/3

4:49 pm-1:10 am

1 stop6h 21m

Philadelphia

dom. 10/5

5:00 am-11:44 am

1 stop8h 44m

$253

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

sáb. 12/13

3:18 pm-11:17 pm

1 stop5h 59m

Philadelphia

mar. 12/16

3:40 pm-10:11 pm

1 stop8h 31m

$343

Colorado SpringsPhiladelphia

COS - PHL

COSPHL

Colorado Springs

jue. 8/28

12:07 pm-12:24 am

1 stop10h 17m

Philadelphia

dom. 8/31

6:45 pm-11:44 pm

1 stop6h 59m

$352

Colorado SpringsPhiladelphia

COS - PHL

COSPHL

Colorado Springs

mié. 8/6

6:00 am-3:00 pm

1 stop7h 00m

Philadelphia

lun. 8/11

8:00 am-12:12 pm

1 stop6h 12m

$357

AspenPhiladelphia

ASE - PHL

ASEPHL

Aspen Pitkin County

jue. 8/14

1:30 pm-12:30 am

2 stops9h 00m

Philadelphia

sáb. 8/16

5:16 pm-9:44 pm

1 stop6h 28m

$363

VailPhiladelphia

EGE - PHL

EGEPHL

Vail Eagle County

mié. 7/16

2:38 pm-12:59 am

1 stop8h 21m

Philadelphia

dom. 7/20

5:00 am-9:42 am

1 stop6h 42m

$369

Colorado SpringsPhiladelphia

COS - PHL

COSPHL

Colorado Springs

jue. 8/28

9:45 am-5:55 pm

1 stop6h 10m

Philadelphia

dom. 8/31

7:35 am-2:25 pm

2 stops8h 50m

$372

DurangoPhiladelphia

DRO - PHL

DROPHL

Durango La Plata County

mié. 8/20

11:52 am-11:23 pm

1 stop9h 31m

Philadelphia

lun. 8/25

6:38 am-12:05 pm

1 stop7h 27m

$378

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 38 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 julio 1, 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 julio 1, 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 (3 on average).

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 julio 1, 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
4,273 reviews

Boarding

8.2

Crew

8.6

Entertainment

7.6

Overall

8.0

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,273 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.2

Crew

8.6

Entertainment

7.6

Overall

8.0

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,973 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.2

Crew

8.6

Entertainment

7.6

Overall

8.0

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,858 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.2

Crew

8.6

Entertainment

7.6

Overall

8.0

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
JetBlue
7.3
Good
2,919 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.2

Crew

8.6

Entertainment

7.6

Overall

8.0

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.2

Crew

8.6

Entertainment

7.6

Overall

8.0

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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 57 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 Frontier. According to our data, you can fly for as low as $97. Users have also found prices from $108 and $115 on Southwest and United Airlines, respectively.

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

    Most travelers choose Denver Intl - Philadelphia, Colorado Springs - Philadelphia or Vail Eagle 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 (87%), Qatar Airways (85%) or American Airlines (81%) 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 $113. On average you can expect to pay $1,649. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $158.

  • 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 Colorado?

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

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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 julio 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$101Average$233FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$406FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$187Average$568FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$187Average$470FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$201Average$420FlexibilityNo cancel feeOn-time63%

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