HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Colorado

$104+ 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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
8月 19 — 8月 261
週二 8/19
週二 8/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Philadelphia to Colorado with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 8月 14, 2025.

Round-trip from

$183
(Frontier)

One-way from

$104
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$285

Good round-trip deal

$227 or less

Good one-way deal

$142 or less
From Philadelphia to Colorado
Search Deals
One-way flight from Philadelphia to Colorado
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals
Price to beat on a round-trip flight from Philadelphia to Colorado.
Search Deals
Price to beat on a one-way flight from Philadelphia to Colorado.
Search Deals

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 8月 14, 2025.

This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 9/512:01 pmPHL - DEN
1 stop9h 17mFrontier
週一 9/86:10 amDEN - PHL
1 stop8h 22mFrontier
Deal found 8/14$183
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 8/2212:18 pmPHL - DEN
1 stop9h 03mFrontier
週一 8/258:15 amDEN - PHL
1 stop9h 11mFrontier
Deal found 8/14$184
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 10/106:42 amPHL - DEN
Nonstop4h 16mFrontier
週一 10/133:01 pmDEN - PHL
1 stop7h 51mFrontier
Deal found 8/14$185
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週四 9/116:45 amPHL - DEN
Nonstop4h 12mFrontier
週日 9/147:15 pmDEN - PHL
Nonstop3h 42mFrontier
Deal found 8/14$186
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週四 10/236:42 amPHL - DEN
Nonstop4h 16mFrontier
週六 11/112:25 pmDEN - PHL
1 stop9h 48mFrontier
Deal found 8/13$187
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週四 9/116:45 amPHL - DEN
Nonstop4h 12mFrontier
週五 9/127:15 pmDEN - PHL
Nonstop3h 42mFrontier
Deal found 8/13$188
This CheapOair deal was found by Cheapflights users on 8/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 9/66:45 amPHL - DEN
Nonstop4h 12mFrontier
週五 9/1912:04 amDEN - PHL
1 stop19h 07mFrontier
Deal found 8/13$189
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週四 10/166:00 amPHL - DEN
2 stops16h 55mFrontier
週日 10/1912:59 amDEN - PHL
1 stop7h 51mFrontier
Deal found 8/14$190
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週四 9/115:15 amPHL - DEN
2 stops20h 27mFrontier
週一 9/1510:55 amDEN - PHL
1 stop11h 41mFrontier
Deal found 8/14$191
This FlightHub deal was found by Cheapflights users on 8/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 9/242:30 pmPHL - DEN
1 stop19h 39mFrontier
週四 9/257:15 pmDEN - PHL
Nonstop3h 42mFrontier
Deal found 8/13$192
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 9/196:15 amPHL - DEN
2 stops17h 16mFrontier
週六 9/2712:59 amDEN - PHL
1 stop7h 57mFrontier
Deal found 8/14$193
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 9/133:55 pmPHL - DEN
2 stops17h 25mFrontier
週日 9/218:30 pmDEN - PHL
1 stop10h 55mFrontier
Deal found 8/14$194

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 8月 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

週四 9/4

6:45 am-8:57 am

Nonstop4h 12m

Denver Intl

週日 9/7

7:15 pm-12:57 am

Nonstop3h 42m

$185

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

週五 10/10

6:42 am-8:58 am

Nonstop4h 16m

Denver Intl

週四 10/16

11:45 pm-5:19 am

Nonstop3h 34m

$188

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

週三 10/15

1:02 pm-11:43 pm

2 stops12h 41m

Denver Intl

週五 10/24

6:00 am-3:00 pm

1 stop7h 00m

$190

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

週六 9/6

4:10 pm-6:15 pm

Nonstop4h 05m

Denver Intl

週三 9/10

5:00 pm-10:30 pm

Nonstop3h 30m

$191

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

週三 9/3

7:45 am-9:35 am

Nonstop3h 50m

Denver Intl

週六 9/6

5:25 pm-11:00 pm

Nonstop3h 35m

$191

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

週四 9/11

12:02 pm-7:07 pm

1 stop9h 05m

Denver Intl

週四 9/11

9:18 pm-6:34 pm

2 stops19h 16m

$191

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

週六 11/15

5:30 am-9:49 pm

2 stops18h 19m

Denver Intl

週一 11/17

11:13 am-12:29 am

1 stop11h 16m

$191

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

週四 10/2

12:02 pm-7:07 pm

1 stop9h 05m

Denver Intl

週三 10/15

8:10 pm-6:44 pm

2 stops20h 34m

$191

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

週四 9/11

12:02 pm-7:07 pm

1 stop9h 05m

Denver Intl

週四 9/18

7:15 pm-12:57 am

Nonstop3h 42m

$192

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

週三 9/17

2:30 pm-8:09 am

1 stop19h 39m

Denver Intl

週五 9/19

1:12 pm-12:57 am

1 stop9h 45m

$192

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 60 results
1
2
3
...
6

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 $197). Flying from Philadelphia to Colorado in March is currently the most expensive (average of $278). 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 8月 14, 2025.

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

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 8月 14, 2025.

The most flights from PHL to USCO are scheduled on a Wednesday (16 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 8月 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
4,244 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,980 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,219 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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, 127 users have taken a look at flights from Philadelphia to Colorado.

  • 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 $104 on Frontier. Other airlines that offer cheap prices include American Airlines from $114 and United Airlines from $130 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 - Grand Junction Regnl 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: Air Canada (75%), Qatar Airways (69%), American Airlines (67%).

  • What are the cheapest flights from Philadelphia to Colorado?

    The cheapest flight price from Philadelphia to Colorado is $95. On average you can expect to pay $757. The most popular route, (Philadelphia - Denver Intl), can usually be booked for $146.

  • 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 $197). Flying from Philadelphia to Colorado in March is currently the most expensive (average of $278). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
Newark to Fort Lauderdale flights
LaGuardia to Fort Lauderdale flights
John F Kennedy Intl to O'Hare Intl flights
Newark to Los Angeles flights
Newark to O'Hare Intl flights
John F Kennedy Intl to Miami flights
LaGuardia to Dallas/Fort Worth flights
Newark to Miami flights
LaGuardia to Miami flights
LaGuardia to O'Hare Intl flights
John F Kennedy Intl to Dallas/Fort Worth flights
John F Kennedy Intl to Orlando flights
Newark to Las Vegas flights
John F Kennedy Intl to San Francisco flights
John F Kennedy Intl to Fort Lauderdale flights
Newark to Orlando flights
Dulles Intl to Dallas/Fort Worth flights
LaGuardia to Atlanta flights
LaGuardia to Orlando flights
Newark to Dallas/Fort Worth flights
LaGuardia to Los Angeles flights
John F Kennedy Intl to Seattle flights
John F Kennedy Intl to Atlanta flights
Newark to San Francisco flights
John F Kennedy Intl to Denver flights
Newark to Seattle flights
John F Kennedy Intl to West Palm Beach flights
Reagan-National to O'Hare Intl flights
Dulles Intl to O'Hare Intl flights
John F Kennedy Intl to Sky Harbor Intl flights
Reagan-National to Los Angeles flights
LaGuardia to Las Vegas flights
LaGuardia to Denver flights
Dulles Intl to Miami flights
LaGuardia to Tampa flights
Newark to Tampa flights
Newark to Atlanta flights
LaGuardia to Nashville flights
Reagan-National to Seattle flights
Reagan-National to Dallas/Fort Worth flights
Dulles Intl to Los Angeles flights
Dulles Intl to Las Vegas flights
Newark to Sky Harbor Intl flights
Philadelphia to Orlando flights
Philadelphia to O'Hare Intl flights
LaGuardia to Hobby flights
John F Kennedy Intl to Tampa flights
John F Kennedy Intl to Midway flights

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 8月 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$106Average$197FlexibilityNo cancel feeOn-time88%
FrontierCheapest$106Average$226FlexibilityNo cancel feeOn-time62%
DeltaCheapest$134Average$371FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$192Average$474FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$192Average$486FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$194Average$612FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$207Average$314FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$251Average$275FlexibilityNo cancel feeOn-time83%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.