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$84+ 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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
Oct 25 — Nov 11
Sat 10/25
Sat 11/1
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 September 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$167
(Kiwi.com)

One-way from

$84
(Frontier)

Popular in

December

Cheapest in

August

Average price

$293

Good round-trip deal

$250 or less

Good one-way deal

$144 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. 6% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 25, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/24. 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.
Fri 10/246:42 amPHL - DEN
Nonstop4h 16mFrontier
Mon 10/2711:18 amDEN - PHL
1 stop8h 12mFrontier
Deal found 9/24$167
This Frontier deal was found by Cheapflights users on 9/24. 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.
Mon 10/205:12 pmPHL - DEN
1 stop7h 47mFrontier
Fri 10/246:00 amDEN - PHL
1 stop7h 00mFrontier
Deal found 9/24$168
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Wed 10/228:00 amPHL - DEN
Nonstop4h 06mUnited Airlines
Sat 10/251:58 pmDEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 9/23$169
This Kiwi.com deal was found by Cheapflights users on 9/24. 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 10/236:42 amPHL - DEN
Nonstop4h 16mFrontier
Sun 10/2612:34 amDEN - PHL
1 stop10h 00mFrontier
Deal found 9/24$170
This Cheapflightsfares deal was found by Cheapflights users on 9/25. 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 10/149:14 pmPHL - DEN
1 stop28h 02mFrontier
Sun 10/1911:59 pmDEN - PHL
1 stop10h 03mFrontier
Deal found 9/25$171
This Cheapflightsfares deal was found by Cheapflights users on 9/25. 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.
Mon 10/135:30 amPHL - DEN
1 stop21h 21mFrontier
Sun 10/2612:34 amDEN - PHL
1 stop10h 00mFrontier
Deal found 9/25$172
This Priceline deal was found by Cheapflights users on 9/25. 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 10/158:15 amPHL - DEN
1 stop9h 26mFrontier
Sun 10/1911:59 pmDEN - PHL
1 stop10h 03mFrontier
Deal found 9/25$173
This Cheapflightsfares deal was found by Cheapflights users on 9/25. 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.
Wed 10/1511:34 amPHL - DEN
1 stop13h 42mFrontier
Sat 10/1810:20 amDEN - PHL
1 stop10h 10mFrontier
Deal found 9/25$174
This Cheapflightsfares deal was found by Cheapflights users on 9/24. 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.
Fri 10/35:05 pmPHL - DEN
1 stop20h 22mFrontier
Mon 10/67:01 pmDEN - PHL
1 stop23h 03mFrontier
Deal found 9/24$175
This Booking.com deal was found by Cheapflights users on 9/24. 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.
Thu 11/138:29 amPHL - DEN
1 stop8h 24mFrontier
Sat 11/1512:34 amDEN - PHL
1 stop22h 51mFrontier
Deal found 9/24$176
This Frontier deal was found by Cheapflights users on 9/23. 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.
Sat 10/255:20 amPHL - DEN
2 stops15h 01mFrontier
Mon 10/2712:59 amDEN - PHL
1 stop6h 42mFrontier
Deal found 9/23$177
This Frontier deal was found by Cheapflights users on 9/24. 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.
Fri 10/246:42 amPHL - DEN
Nonstop4h 16mFrontier
Sun 10/2611:45 pmDEN - PHL
Nonstop3h 34mFrontier
Deal found 9/24$178

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 September 25, 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

Wed 10/15

8:00 am-10:06 am

Nonstop4h 06m

Denver Intl

Sat 10/25

1:58 pm-7:35 pm

Nonstop3h 37m

$194

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 10/30

8:08 am-10:29 am

Nonstop4h 21m

Denver Intl

Mon 11/3

5:37 pm-11:09 pm

Nonstop3h 32m

$237

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 12/10

4:55 pm-7:05 pm

Nonstop4h 10m

Denver Intl

Sun 12/14

6:20 pm-11:45 pm

Nonstop3h 25m

$238

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 11/9

7:00 am-9:10 am

Nonstop4h 10m

Denver Intl

Sat 11/15

11:55 pm-11:25 am

1 stop9h 30m

$247

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 10/18

8:05 am-10:11 am

Nonstop4h 06m

Denver Intl

Sat 10/25

10:00 am-3:41 pm

Nonstop3h 41m

$268

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 10/15

6:30 pm-10:05 pm

1 stop5h 35m

Denver Intl

Sat 10/25

5:40 pm-11:10 pm

Nonstop3h 30m

$287

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 1/21

6:30 am-10:35 am

1 stop6h 05m

Denver Intl

Wed 1/21

5:55 pm-11:30 pm

Nonstop3h 35m

$288

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 10/17

6:10 pm-8:20 pm

Nonstop4h 10m

Denver Intl

Sat 10/25

5:40 pm-11:10 pm

Nonstop3h 30m

$288

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 1/29

10:30 am-2:46 pm

1 stop6h 16m

Denver Intl

Tue 2/24

5:57 pm-11:30 pm

Nonstop3h 33m

$288

PhiladelphiaDurango

PHL - DRO

PHLDRO

Philadelphia

Fri 10/31

6:20 am-11:16 am

1 stop6h 56m

Durango La Plata County

Mon 11/3

6:55 pm-5:25 am

1 stop8h 30m

$298

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/23

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 $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 September 25, 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 September 25, 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 (5 on average).

How much does it cost to fly round-trip from Philadelphia to Colorado?

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 September 25, 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
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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
8.0
Very good
7,973 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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
8,926 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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
3,162 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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, 130 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 06m. United Airlines provides one of the quickest options available for as low as $194. The distance between Philadelphia and Colorado is about 1553 mi. This flight may include one or multiple stops.

  • 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 $88 on Frontier. Other airlines that offer cheap prices include Southwest from $119 and American Airlines from $139 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 - Colorado Springs or Philadelphia - Hayden Yampa Valley 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: Aer Lingus (100%), Air Canada (86%), Qatar Airways (85%).

  • What are the cheapest flights from Philadelphia to Colorado?

    The cheapest flight price from Philadelphia to Colorado is $84. On average you can expect to pay $728. The most popular route, (Philadelphia - Denver Intl), can usually be booked for $135.

  • 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

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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 September 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$106Average$197FlexibilityNo cancel feeOn-time88%
FrontierCheapest$114Average$230FlexibilityNo cancel feeOn-time62%
DeltaCheapest$134Average$379FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$193Average$476FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$193Average$594FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$194Average$479FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$207Average$325FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$251Average$280FlexibilityNo cancel feeOn-time83%

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