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$80+ Cheap flights from Philadelphia (PHL) to Colorado

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 2/14. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
Dec 14 — Dec 211
Sun 12/14
Sun 12/21
1 adult, Economy
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Cheap flight deals from Philadelphia to Colorado

Keep the following information in mind while searching for Philadelphia to Colorado flight deals. Data was last updated November 14, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$152
(Kiwi.com)

One-way from

$80
(Southwest)

Popular in

December

Cheapest in

August

Average price

$334

Good round-trip deal

$250 or less

Good one-way deal

$163 or less
Provider with most accurate pricing for Philadelphia-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Denver Intl flights.
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From Philadelphia to Colorado
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One-way flight from Philadelphia to Colorado
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Highest demand for flights based on searches. 5% potential increase in price ($19 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Philadelphia to Colorado.
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Price to beat on a one-way flight from Philadelphia to Colorado.
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Find flight deals from Philadelphia to Colorado

Cheapest flights from Philadelphia to Colorado
Explore the most affordable flight options available from Philadelphia to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 14, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/231:54 pmPHL - DEN
1 stop11h 19mFrontier
Mon 12/293:45 pmDEN - PHL
1 stop7h 39mFrontier
Deal found 11/12$152
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/64:00 pmPHL - DEN
2 stops19h 02mMultiple Airlines
Mon 12/812:59 amDEN - PHL
1 stop6h 48mMultiple Airlines
Deal found 11/12$153
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/215:01 amPHL - DEN
1 stop11h 53mFrontier
Sat 12/2712:14 amDEN - PHL
1 stop22h 28mFrontier
Deal found 11/12$154
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:30 amPHL - DEN
1 stop15h 38mFrontier
Mon 12/111:59 pmDEN - PHL
1 stop22h 41mFrontier
Deal found 11/12$155
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:30 amPHL - DEN
1 stop15h 38mFrontier
Tue 12/22:00 pmDEN - PHL
1 stop8h 40mFrontier
Deal found 11/12$156
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/231:54 pmPHL - DEN
1 stop11h 19mFrontier
Mon 1/56:21 pmDEN - PHL
1 stop9h 19mFrontier
Deal found 11/11$157
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:00 amPHL - DEN
1 stop11h 47mFrontier
Mon 1/56:21 pmDEN - PHL
1 stop9h 19mFrontier
Deal found 11/11$158
This CheapOair deal was found by Cheapflights users on 11/14. 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.
Sat 12/135:05 amPHL - DEN
1 stop30h 05mFrontier
Thu 12/1811:59 pmDEN - PHL
Nonstop3h 32mFrontier
Deal found 11/14$159
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/205:50 pmPHL - DEN
1 stop17h 13mFrontier
Sun 11/236:00 amDEN - PHL
1 stop8h 24mFrontier
Deal found 11/12$160
This Kiwi.com deal was found by Cheapflights users on 11/13. 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 11/2412:00 pmPHL - DEN
1 stop9h 13mFrontier
Fri 11/288:31 amDEN - PHL
1 stop8h 15mFrontier
Deal found 11/13$161
This Frontier deal was found by Cheapflights users on 11/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/215:01 amPHL - DEN
1 stop11h 53mFrontier
Fri 12/2611:59 pmDEN - PHL
Nonstop3h 32mFrontier
Deal found 11/12$162
This Kiwi.com deal was found by Cheapflights users on 11/13. 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.
Tue 11/256:00 amPHL - DEN
Nonstop4h 25mFrontier
Thu 11/2711:50 amDEN - PHL
2 stops10h 40mFrontier
Deal found 11/13$163

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Colorado 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 November 14, 2025.
Use the filters below to find and compare flights from Philadelphia to Colorado that are best for you.

Fly from

Philadelphia

Fly to

Colorado

Route

Depart

Return

Price

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 2/13

6:40 am-9:03 am

Nonstop4h 23m

Denver Intl

Thu 2/19

1:00 pm-12:13 am

1 stop9h 13m

$155

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 12/6

3:35 pm-5:55 pm

Nonstop4h 20m

Denver Intl

Sat 12/13

5:50 pm-11:22 pm

Nonstop3h 32m

$183

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 2/7

3:43 pm-6:12 pm

Nonstop4h 29m

Denver Intl

Sat 2/14

6:20 pm-11:53 pm

Nonstop3h 33m

$204

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 2/7

2:05 pm-4:25 pm

Nonstop4h 20m

Denver Intl

Sat 2/14

7:20 am-4:55 pm

1 stop7h 35m

$214

PhiladelphiaDurango

PHL - DRO

PHLDRO

Philadelphia

Sat 2/7

10:43 am-6:19 pm

2 stops9h 36m

Durango La Plata County

Sat 2/14

5:50 am-2:27 pm

1 stop6h 37m

$244

PhiladelphiaMontrose

PHL - MTJ

PHLMTJ

Philadelphia

Tue 3/24

8:25 am-1:19 pm

1 stop6h 54m

Montrose County

Wed 3/25

2:17 pm-12:22 am

1 stop8h 05m

$249

PhiladelphiaGrand Junction

PHL - GJT

PHLGJT

Philadelphia

Thu 12/4

3:58 pm-10:59 pm

1 stop9h 01m

Grand Junction Regnl

Sun 12/7

6:54 pm-7:01 am

1 stop10h 07m

$249

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 12/11

6:35 am-8:45 am

Nonstop4h 10m

Denver Intl

Thu 12/11

10:15 am-9:15 pm

1 stop9h 00m

$253

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 1/28

5:00 pm-7:20 pm

Nonstop4h 20m

Denver Intl

Fri 1/30

4:35 pm-10:00 pm

Nonstop3h 25m

$253

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 12/11

6:00 am-11:20 am

1 stop7h 20m

Denver Intl

Tue 12/16

5:15 pm-10:35 pm

Nonstop3h 20m

$254

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

Showing 1-10 of 60 results
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Best time to book a flight from Philadelphia to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from Philadelphia 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 Philadelphia to Colorado

What is the cheapest month to book a flight from Philadelphia to Colorado?

Currently, October is the cheapest month in which you can book a flight from Philadelphia to Colorado (average of $88). Flying from Philadelphia to Colorado in May is currently the most expensive (average of $143). 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 PHL to CO?

Find hourly flight availability from Philadelphia to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 14, 2025.

It’s optimal to fly from Philadelphia to Colorado at noon. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Philadelphia to Colorado?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Colorado. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Philadelphia to Colorado flight should consider departing on Friday at noon when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Philadelphia to Colorado

Explore weekly flight availability from Philadelphia to Colorado. 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 November 14, 2025.

The most flights from PHL to USCO are scheduled on a Thursday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated November 14, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Philadelphia to Colorado to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
8,006 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,016 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,051 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,109 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Colorado. 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 from for flights from Philadelphia to Colorado?

    Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to Colorado. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.

  • How popular is this Philadelphia to Colorado flight route?

    Within the past month, 124 users have taken a look at flights from Philadelphia to Colorado.

  • How long is the flight from Philadelphia to Colorado?

    A quick flight from Philadelphia to Colorado can take about 4h 20m. Frontier provides one of the quickest options available for as low as $183. The distance between Philadelphia and Colorado is about 1553 mi. All flights are typically nonstop.

  • What are the cheapest airlines to fly from Philadelphia to Colorado one-way?

    One-way options have recently been found by users for as low as $80 on Southwest. Other airlines that offer cheap prices include Frontier from $88 and Delta from $180 one-way.

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

    When deciding which route to take from Philadelphia to Colorado consider Philadelphia - Denver Intl, Philadelphia - Hayden Yampa Valley or Philadelphia - Aspen Pitkin County as they are the most popular.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Philadelphia to Colorado on time: United Airlines (93%), Air Canada (91%), Frontier (83%).

  • What are the cheapest flights from Philadelphia to Colorado?

    The cheapest flight price from Philadelphia to Colorado is $81. On average you can expect to pay $746. The most popular route, (Philadelphia - Denver Intl), can usually be booked for $119.

  • Can I find deals for flights from Philadelphia to Colorado that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Colorado flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Colorado?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Colorado.

  • Can I find deals for business class flights from Philadelphia to Colorado?

    Yes. Cheapflights offers flight deals from Philadelphia to Colorado 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 Philadelphia to Colorado?

    Currently, October is the cheapest month in which you can book a flight from Philadelphia to Colorado (average of $88). Flying from Philadelphia to Colorado in May is currently the most expensive (average of $143). 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

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Alternative routes for Philadelphia to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Philadelphia to Colorado

Discover the top 8 airlines that operate flights from Philadelphia to Colorado. 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 November 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$106Average$194FlexibilityNo cancel feeOn-time88%
FrontierCheapest$118Average$228FlexibilityNo cancel feeOn-time62%
DeltaCheapest$134Average$385FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$177Average$275FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$191Average$548FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$197Average$474FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$201Average$476FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$207Average$293FlexibilityNo cancel feeOn-time62%

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