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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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$176
(Cheapflightsfares)

One-way from

$99
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$306

Good round-trip deal

$206 or less

Good one-way deal

$129 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 ($35 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 June 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 June 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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.
Tue 7/1511:30 pmDEN - PHL
Nonstop3h 39mFrontier
Tue 7/226:15 amPHL - DEN
Nonstop4h 13mFrontier
Deal found 6/12$176
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/238:53 amDEN - PHL
Nonstop3h 41mAmerican Airlines
Wed 8/278:40 amPHL - DEN
Nonstop4h 00mAmerican Airlines
Deal found 6/11$197
This Delta deal was found by Cheapflights users on 6/12. 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.
Fri 8/154:00 pmDEN - PHL
1 stop5h 50mDelta
Wed 8/206:25 pmPHL - DEN
1 stop6h 30mDelta
Deal found 6/12$257
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/197:02 pmDRO - PHL
1 stop9h 54mAmerican Airlines
Sat 8/27:00 pmPHL - DRO
1 stop7h 10mAmerican Airlines
Deal found 6/11$278
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/310:21 amASE - PHL
1 stop8h 52mAmerican Airlines
Sun 10/57:20 amPHL - ASE
1 stop6h 21mAmerican Airlines
Deal found 6/11$289
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/98:12 amEGE - PHL
1 stop9h 07mAmerican Airlines
Tue 9/1610:53 amPHL - EGE
1 stop9h 44mAmerican Airlines
Deal found 6/11$289
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1112:14 pmGJT - PHL
1 stop9h 20mAmerican Airlines
Mon 7/147:00 pmPHL - GJT
1 stop7h 17mAmerican Airlines
Deal found 6/11$289
This Delta deal was found by Cheapflights users on 6/12. 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.
Thu 8/286:50 pmGJT - PHL
1 stop8h 55mDelta
Sat 8/302:35 pmPHL - GJT
2 stops10h 08mDelta
Deal found 6/12$294
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/62:22 pmCOS - PHL
1 stop8h 37mDelta
Mon 8/116:00 amPHL - COS
1 stop6h 16mDelta
Deal found 6/10$297
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/47:45 amDEN - PHL
2 stops9h 00mSouthwest
Tue 7/87:30 pmPHL - DEN
1 stop6h 10mSouthwest
Deal found 6/11$302
This United Airlines deal was found by Cheapflights users on 6/12. 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.
Mon 8/1111:59 pmDEN - PHL
Nonstop3h 38mUnited Airlines
Wed 8/209:55 amPHL - DEN
Nonstop4h 07mUnited Airlines
Deal found 6/12$307
This Priceline deal was found by Cheapflights users on 6/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1911:15 pmDEN - PHL
Nonstop3h 34mMultiple Airlines
Sun 11/2310:00 amPHL - DEN
1 stop9h 17mMultiple Airlines
Deal found 6/11$313

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 June 12, 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

Tue 7/15

11:30 pm-5:09 am

Nonstop3h 39m

Philadelphia

Tue 7/22

6:15 am-8:28 am

Nonstop4h 13m

$176

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 8/23

8:53 am-2:34 pm

Nonstop3h 41m

Philadelphia

Wed 8/27

8:40 am-10:40 am

Nonstop4h 00m

$197

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 8/15

12:10 pm-10:20 pm

1 stop8h 10m

Philadelphia

Mon 8/18

6:59 pm-11:09 pm

1 stop6h 10m

$257

DurangoPhiladelphia

DRO - PHL

DROPHL

Durango La Plata County

Sat 7/19

7:02 pm-6:56 am

1 stop9h 54m

Philadelphia

Sat 8/2

7:00 pm-12:10 am

1 stop7h 10m

$278

AspenPhiladelphia

ASE - PHL

ASEPHL

Aspen Pitkin County

Fri 10/3

10:21 am-9:13 pm

1 stop8h 52m

Philadelphia

Sun 10/5

7:20 am-11:41 am

1 stop6h 21m

$289

VailPhiladelphia

EGE - PHL

EGEPHL

Vail Eagle County

Tue 9/9

8:12 am-7:19 pm

1 stop9h 07m

Philadelphia

Tue 9/16

10:53 am-6:37 pm

1 stop9h 44m

$289

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

Fri 7/11

6:59 pm-6:50 am

1 stop9h 51m

Philadelphia

Thu 7/17

5:55 pm-12:17 am

1 stop8h 22m

$289

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

Thu 8/28

6:50 pm-5:45 am

1 stop8h 55m

Philadelphia

Sat 8/30

2:35 pm-10:43 pm

2 stops10h 08m

$294

Colorado SpringsPhiladelphia

COS - PHL

COSPHL

Colorado Springs

Wed 8/6

2:22 pm-12:59 am

1 stop8h 37m

Philadelphia

Mon 8/11

6:00 am-10:16 am

1 stop6h 16m

$297

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Fri 7/4

7:45 am-6:45 pm

2 stops9h 00m

Philadelphia

Tue 7/8

7:30 pm-11:40 pm

1 stop6h 10m

$302

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 52 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 June 12, 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 June 12, 2025.

The most flights from USCO to PHL are scheduled on a Wednesday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

Temperature in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Philadelphia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

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 June 12, 2025.
Read reviews from past customers who have flown Southwest, Delta and United Airlines from Colorado to Philadelphia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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
2,925 reviews
Southwest
8.0
Very good
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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
4,287 reviews

Entertainment

7.6

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.1

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 62 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 $118 and $125 on Frontier and JetBlue, respectively.

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

    Most travelers choose Denver Intl - Philadelphia, Colorado Springs - Philadelphia or Aspen Pitkin County - Philadelphia when deciding on the best route from Colorado to Philadelphia.

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

    Consider British Airways (100%), Qatar Airways (89%) or Aer Lingus (87%) 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 $94. On average you can expect to pay $1,847. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $181.

  • 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
Pottstown
King of Prussia
Cherry Hill
Exton
Ocean City
Chester
Essington
Reading
Newark
Middletown
Millville
Ephrata
Camden
Dover
Elkton
Willow Grove
Glen Mills
Springfield

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$91Average$226FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$406FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$188Average$565FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$188Average$477FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$199Average$420FlexibilityNo cancel feeOn-time63%

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