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$96+ 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 6/23. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$184
(Frontier)

One-way from

$96
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$267

Good round-trip deal

$261 or less

Good one-way deal

$148 or less
Provider with most accurate pricing for Denver Intl-Philadelphia flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Philadelphia flights.
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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. 14% potential increase in price ($47 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/173:36 pmDEN - PHL
Nonstop3h 39mFrontier
Mon 5/266:15 amPHL - DEN
Nonstop4h 22mFrontier
Deal found 4/29$184
This Booking.com deal was found by Cheapflights users on 4/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2411:30 pmDEN - PHL
Nonstop3h 37mMultiple Airlines
Thu 5/2912:21 pmPHL - DEN
1 stop7h 06mMultiple Airlines
Deal found 4/30$211
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Tue 6/37:00 amDEN - PHL
Nonstop3h 36mAmerican Airlines
Tue 6/1012:49 pmPHL - DEN
1 stop5h 55mAmerican Airlines
Deal found 4/30$213
This Southwest deal was found by Cheapflights users on 4/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/35:30 pmDEN - PHL
Nonstop3h 35mSouthwest
Tue 6/105:55 amPHL - DEN
2 stops6h 45mSouthwest
Deal found 4/29$230
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/212:59 amDEN - PHL
1 stop6h 32mDelta
Sat 6/74:58 pmPHL - DEN
1 stop6h 50mDelta
Deal found 4/28$257
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 5/135:59 pmDEN - PHL
Nonstop3h 36mUnited Airlines
Thu 5/159:45 amPHL - DEN
Nonstop4h 17mUnited Airlines
Deal found 4/29$284
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Tue 6/106:59 pmGJT - PHL
1 stop8h 51mAmerican Airlines
Tue 6/175:00 amPHL - GJT
1 stop6h 55mAmerican Airlines
Deal found 4/30$285
This Sun Country Air deal was found by Cheapflights users on 4/30. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/226:54 pmDEN - PHL
1 stop14h 17mSun Country Air
Mon 5/2612:03 pmPHL - DEN
1 stop25h 24mSun Country Air
Deal found 4/30$315
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Tue 6/103:26 pmMTJ - PHL
1 stop5h 58mUnited Airlines
Sun 6/158:29 amPHL - MTJ
1 stop8h 01mUnited Airlines
Deal found 4/30$324
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/278:00 amCOS - PHL
1 stop7h 38mDelta
Tue 6/174:05 pmPHL - COS
1 stop6h 52mDelta
Deal found 4/29$341
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/258:05 amASE - PHL
1 stop7h 13mDelta
Tue 7/85:30 amPHL - ASE
1 stop7h 51mDelta
Deal found 4/29$343
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 6/254:35 pmASE - PHL
1 stop6h 24mAmerican Airlines
Tue 7/810:25 amPHL - ASE
2 stops9h 39mAmerican Airlines
Deal found 4/29$348

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 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

Sat 5/17

3:36 pm-9:15 pm

Nonstop3h 39m

Philadelphia

Mon 5/26

6:15 am-8:37 am

Nonstop4h 22m

$184

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 5/24

11:30 pm-5:07 am

Nonstop3h 37m

Philadelphia

Thu 5/29

12:21 pm-5:27 pm

1 stop7h 06m

$211

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 6/3

7:00 am-12:36 pm

Nonstop3h 36m

Philadelphia

Tue 6/10

12:49 pm-4:44 pm

1 stop5h 55m

$213

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 6/3

5:30 pm-11:05 pm

Nonstop3h 35m

Philadelphia

Tue 6/10

5:55 am-10:40 am

2 stops6h 45m

$230

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Mon 6/2

12:59 am-9:31 am

1 stop6h 32m

Philadelphia

Sat 6/7

4:58 pm-9:48 pm

1 stop6h 50m

$257

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 5/13

5:59 pm-11:35 pm

Nonstop3h 36m

Philadelphia

Thu 5/15

9:45 am-12:02 pm

Nonstop4h 17m

$284

Grand JunctionPhiladelphia

GJT - PHL

GJTPHL

Grand Junction Regnl

Tue 6/10

6:59 pm-5:50 am

1 stop8h 51m

Philadelphia

Tue 6/17

5:00 am-9:55 am

1 stop6h 55m

$285

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 5/22

6:54 pm-11:11 am

1 stop14h 17m

Philadelphia

Mon 5/26

12:03 pm-11:27 am

1 stop25h 24m

$315

MontrosePhiladelphia

MTJ - PHL

MTJPHL

Montrose County

Tue 6/10

3:26 pm-11:24 pm

1 stop5h 58m

Philadelphia

Sun 6/15

8:29 am-2:30 pm

1 stop8h 01m

$324

Colorado SpringsPhiladelphia

COS - PHL

COSPHL

Colorado Springs

Tue 5/27

8:00 am-5:38 pm

1 stop7h 38m

Philadelphia

Tue 6/17

4:05 pm-8:57 pm

1 stop6h 52m

$341

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 49 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 May 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 May 1, 2025.

The most flights from USCO to PHL are scheduled on a Wednesday (13 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 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 May 1, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Colorado to Philadelphia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,922 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 74 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 $96. Users have also found prices from $106 and $107 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 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 (89%), Air Canada (86%) or Qatar Airways (86%) 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 $97. On average you can expect to pay $579. The most popular route, (Denver Intl - Philadelphia), can usually be booked for $153.

  • 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
Pottstown
Wildwood
King of Prussia
Reading
Cherry Hill
Exton
Ocean City
Essington
Chester
Middletown
Willow Grove
Newark
Millville
Ephrata
Camden
Dewey Beach
West Chester
Malvern
Dover

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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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$90Average$212FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$188Average$582FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$189Average$476FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$193Average$422FlexibilityNo cancel feeOn-time63%
DeltaCheapest$235Average$413FlexibilityNo cancel feeOn-timeN/A

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