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$92+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
Jun 11 — Jun 181
Thu 6/11
Thu 6/18
1 adult, Economy
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Cheap 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 May 12, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/7. 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 7/38:37 pm
PHL
-
DEN
Nonstop4h 22m
Frontier
Tue 7/711:49 pm
DEN
-
PHL
1 stop7h 02m
Frontier
Deal found 5/7$167
This Cheapflightsfares deal was found by Cheapflights users on 5/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:35 pm
PHL
-
DEN
Nonstop4h 29m
Frontier
Wed 6/311:56 pm
DEN
-
PHL
1 stop6h 58m
Frontier
Deal found 5/11$168
This Frontier deal was found by Cheapflights users on 5/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:35 pm
PHL
-
DEN
Nonstop4h 29m
Frontier
Wed 6/36:30 am
DEN
-
PHL
1 stop10h 40m
Frontier
Deal found 5/11$169
This Kiwi.com deal was found by Cheapflights users on 5/11. 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.
Fri 7/38:37 pm
PHL
-
DEN
Nonstop4h 22m
Frontier
Wed 7/810:39 pm
DEN
-
PHL
1 stop8h 42m
Frontier
Deal found 5/11$171
This Super.com deal was found by Cheapflights users on 5/7. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/263:00 pm
PHL
-
DEN
1 stop8h 19m
Frontier
Fri 5/2911:59 pm
DEN
-
PHL
Nonstop3h 38m
Frontier
Deal found 5/7$177
This Mytrip deal was found by Cheapflights users on 5/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:35 pm
PHL
-
DEN
Nonstop4h 29m
Frontier
Tue 6/26:03 am
DEN
-
PHL
1 stop27h 13m
Frontier
Deal found 5/10$178
This Frontier deal was found by Cheapflights users on 5/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/263:00 pm
PHL
-
DEN
1 stop8h 19m
Frontier
Wed 5/2711:59 pm
DEN
-
PHL
Nonstop3h 38m
Frontier
Deal found 5/11$179
This Kiwi.com deal was found by Cheapflights users on 5/8. 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 7/38:37 pm
PHL
-
DEN
Nonstop4h 22m
Frontier
Sat 7/117:41 am
DEN
-
PHL
1 stop5h 54m
Frontier
Deal found 5/8$181
This Cheapflightsfares deal was found by Cheapflights users on 5/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:35 pm
PHL
-
DEN
Nonstop4h 29m
Frontier
Sat 6/611:54 pm
DEN
-
PHL
1 stop10h 31m
Frontier
Deal found 5/11$182
This Frontier deal was found by Cheapflights users on 5/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:35 pm
PHL
-
DEN
Nonstop4h 29m
Frontier
Thu 6/46:03 am
DEN
-
PHL
1 stop8h 45m
Frontier
Deal found 5/11$183
This Super.com deal was found by Cheapflights users on 5/11. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:35 pm
PHL
-
DEN
Nonstop4h 29m
Frontier
Tue 6/211:59 pm
DEN
-
PHL
Nonstop3h 38m
Frontier
Deal found 5/11$185
This Kiwi.com deal was found by Cheapflights users on 5/9. 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 5/248:35 pm
PHL
-
DEN
Nonstop4h 29m
Frontier
Wed 5/2711:54 pm
DEN
-
PHL
1 stop10h 31m
Frontier
Deal found 5/9$186

Find flight deals from Philadelphia to Colorado

Keep the following information in mind while searching for Philadelphia to Colorado flight deals. Data was last updated May 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$167
(Kiwi.com)

One-way from

$92
(Super.com)

Popular in

March

Cheapest in

August

Average price

$312

Good round-trip deal

$270 or less

Good one-way deal

$149 or less
Provider with most accurate pricing for Philadelphia-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Denver Intl flights.
Search Deals
From Philadelphia to Colorado
Search Deals
One-way flight from Philadelphia to Colorado
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
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

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 May 12, 2026.
Use the filters below to find and compare flights from Philadelphia to Colorado that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 5/24

5:17 am-11:17 am

1 stop8h 00m

Denver Intl

Thu 5/28

3:12 pm-11:07 pm

1 stop5h 55m

$277

PhiladelphiaColorado Springs

PHL - COS

PHLCOS

Philadelphia

Fri 7/3

9:46 am-9:07 pm

2 stops13h 21m

Colorado Springs

Mon 7/6

6:20 pm-6:08 am

1 stop9h 48m

$346

PhiladelphiaDurango

PHL - DRO

PHLDRO

Philadelphia

Sat 10/10

3:48 pm-8:52 pm

1 stop7h 04m

Durango La Plata County

Fri 10/16

1:32 pm-12:37 am

2 stops9h 05m

$354

PhiladelphiaGrand Junction

PHL - GJT

PHLGJT

Philadelphia

Fri 6/5

8:00 am-12:31 pm

1 stop6h 31m

Grand Junction Regnl

Mon 6/8

1:33 pm-12:59 am

2 stops9h 26m

$364

PhiladelphiaColorado Springs

PHL - COS

PHLCOS

Philadelphia

Wed 6/3

5:50 am-9:45 am

1 stop5h 55m

Colorado Springs

Wed 6/10

5:35 am-4:10 pm

2 stops8h 35m

$376

PhiladelphiaColorado Springs

PHL - COS

PHLCOS

Philadelphia

Sat 9/19

12:10 pm-8:05 pm

2 stops9h 55m

Colorado Springs

Wed 9/23

6:15 am-6:00 pm

2 stops9h 45m

$398

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 5/28

6:12 am-9:43 am

1 stop5h 31m

Denver Intl

Thu 6/11

2:59 pm-11:17 pm

1 stop6h 18m

$402

PhiladelphiaColorado Springs

PHL - COS

PHLCOS

Philadelphia

Thu 6/4

5:00 am-8:55 am

1 stop5h 55m

Colorado Springs

Mon 6/8

4:55 pm-12:40 am

1 stop5h 45m

$405

PhiladelphiaGrand Junction

PHL - GJT

PHLGJT

Philadelphia

Fri 8/21

3:48 pm-8:35 pm

1 stop6h 47m

Grand Junction Regnl

Sun 8/30

9:24 am-7:25 pm

1 stop8h 01m

$407
Quickest round-trip

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 5/27

5:50 am-7:55 am

Nonstop4h 05m

Denver Intl

Sun 5/31

7:45 pm-1:15 am

Nonstop3h 30m

$409

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/10

Showing 1-10 of 60 resultsSorted by cheapest first
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2
3
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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

How far ahead should I book a flight from Philadelphia to Colorado?

To ensure you get the cheapest price possible for a flight from Philadelphia to Colorado, you should look to book at least 31 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, December is the cheapest month in which you can book a flight from Philadelphia to Colorado (average of $77). Flying from Philadelphia to Colorado in January is currently the most expensive (average of $576). 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 May 12, 2026.

It’s optimal to fly from Philadelphia to Colorado in the evening. By choosing this option you can save up to 70% on the cost of your flight, compared to a flight in the morning.

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 May 9, 2026.

Travelers seeking maximum savings on their Philadelphia to Colorado flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday 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 May 12, 2026.

The most flights from PHL to USCO are scheduled on a Monday (14 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 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 May 12, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited 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
4,295 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,295 reviews
Southwest
8.0
Very good
4,295 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,446 reviews
Southwest
8.0
Very good
4,295 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,701 reviews
Southwest
8.0
Very good
4,295 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,661 reviews
Southwest
8.0
Very good
4,295 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.6
Fair
2,950 reviews
Southwest
8.0
Very good
4,295 reviews

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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, 154 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 5h 55m. Delta provides one of the quickest options available for as low as $376. The distance between Philadelphia and Colorado is about 1568 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 $61 on Frontier. Other airlines that offer cheap prices include JetBlue from $79 and American Airlines from $92 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 - Montrose 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: Qatar Airways (96%), United Airlines (93%), Air Canada (92%).

  • What are the cheapest flights from Philadelphia to Colorado?

    The cheapest flight price from Philadelphia to Colorado is $85. On average you can expect to pay $798. The most popular route, (Philadelphia - Denver Intl), can usually be booked for $203.

  • 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, December is the cheapest month in which you can book a flight from Philadelphia to Colorado (average of $77). Flying from Philadelphia to Colorado in January is currently the most expensive (average of $576). 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 6 airlines flying from Philadelphia to Colorado

Discover the top 6 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 May 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$95Average$212FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$446FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$187Average$449FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$190Average$471FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$207Average$445FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$220Average$293FlexibilityNo cancel feeOn-time62%

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