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$89+ 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
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 diciembre 12, 2025.

This Frontier deal was found by Cheapflights users on 12/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/217:05 amPHL - DEN
1 stop15h 00mFrontier
jue. 12/2511:59 pmDEN - PHL
Nonstop3h 32mFrontier
Deal found 12/10$155
This Frontier deal was found by Cheapflights users on 12/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/187:05 amPHL - DEN
1 stop14h 59mFrontier
jue. 12/2511:59 pmDEN - PHL
Nonstop3h 32mFrontier
Deal found 12/10$156
This CheapOair deal was found by Cheapflights users on 12/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/316:36 pmPHL - DEN
1 stop16h 20mFrontier
mié. 1/711:59 pmDEN - PHL
1 stop10h 34mFrontier
Deal found 12/11$167
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/3010:00 pmPHL - DEN
1 stop27h 04mFrontier
mar. 1/611:12 amDEN - PHL
1 stop7h 00mFrontier
Deal found 12/10$172
This Kiwi.com deal was found by Cheapflights users on 12/11. 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.
mié. 12/316:36 pmPHL - DEN
1 stop16h 20mMultiple Airlines
mié. 1/712:26 pmDEN - PHL
2 stops18h 21mMultiple Airlines
Deal found 12/11$173
This Kiwi.com deal was found by Cheapflights users on 12/9. 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.
jue. 12/188:36 pmPHL - DEN
Nonstop4h 23mFrontier
sáb. 1/1011:22 amDEN - PHL
1 stop9h 22mFrontier
Deal found 12/9$182
This CheapOair deal was found by Cheapflights users on 12/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/316:36 pmPHL - DEN
1 stop16h 20mFrontier
lun. 1/511:59 pmDEN - PHL
1 stop12h 39mFrontier
Deal found 12/11$184
This Kiwi.com deal was found by Cheapflights users on 12/9. 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.
vie. 12/1910:00 pmPHL - DEN
1 stop27h 04mFrontier
sáb. 1/1011:22 amDEN - PHL
1 stop9h 22mFrontier
Deal found 12/9$197
This Super.com deal was found by Cheapflights users on 12/10. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/206:00 amPHL - DEN
1 stop19h 04mFrontier
jue. 1/16:05 amDEN - PHL
1 stop8h 51mFrontier
Deal found 12/10$207
This Expedia deal was found by Cheapflights users on 12/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/217:05 amPHL - DEN
1 stop15h 00mFrontier
vie. 12/266:25 amDEN - PHL
1 stop9h 38mFrontier
Deal found 12/11$208
This Kiwi.com deal was found by Cheapflights users on 12/9. 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.
dom. 12/217:05 amPHL - DEN
1 stop15h 00mFrontier
vie. 1/96:00 amDEN - PHL
1 stop27h 13mFrontier
Deal found 12/9$217
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/256:35 amPHL - EGE
1 stop6h 29mUnited Airlines
sáb. 12/2711:37 amEGE - PHL
2 stops11h 08mUnited Airlines
Deal found 12/10$398

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 diciembre 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$139
(Frontier)

One-way from

$89
(Kiwi.com)

Popular in

December

Cheapest in

July

Average price

$388

Good round-trip deal

$286 or less

Good one-way deal

$168 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. 5% potential increase in price ($19 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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

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 diciembre 12, 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

jue. 2/5

9:02 pm-8:30 am

1 stop13h 28m

Denver Intl

sáb. 2/7

1:20 pm-10:46 pm

1 stop7h 26m

$148

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

mié. 2/4

6:00 am-12:19 pm

1 stop8h 19m

Denver Intl

vie. 2/6

6:30 am-4:47 pm

1 stop8h 17m

$148

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

mié. 2/4

6:00 am-12:19 pm

1 stop8h 19m

Denver Intl

sáb. 2/7

1:20 pm-10:46 pm

1 stop7h 26m

$148

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

vie. 2/6

8:43 pm-10:00 am

1 stop15h 17m

Denver Intl

sáb. 2/7

1:20 pm-10:46 pm

1 stop7h 26m

$172

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

jue. 2/5

9:30 am-9:49 pm

2 stops14h 19m

Denver Intl

vie. 2/6

6:30 am-4:47 pm

1 stop8h 17m

$177

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

dom. 1/18

8:05 am-2:24 pm

1 stop8h 19m

Denver Intl

mar. 1/20

5:55 pm-11:30 pm

Nonstop3h 35m

$207

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

mié. 12/31

6:36 pm-8:56 am

1 stop16h 20m

Denver Intl

lun. 1/5

11:59 pm-5:31 am

Nonstop3h 32m

$218

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

sáb. 1/10

2:05 pm-4:25 pm

Nonstop4h 20m

Denver Intl

sáb. 1/17

12:30 pm-7:55 pm

1 stop5h 25m

$233

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

sáb. 1/17

8:05 am-4:21 pm

1 stop10h 16m

Denver Intl

sáb. 1/24

5:55 pm-11:30 pm

Nonstop3h 35m

$233

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

mar. 2/10

8:09 am-10:35 am

Nonstop4h 26m

Denver Intl

mié. 2/18

6:00 am-2:24 pm

1 stop6h 24m

$233

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

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 diciembre 12, 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 diciembre 12, 2025.

The most flights from PHL to USCO are scheduled on a Friday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 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 diciembre 12, 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
7.9
Good
4,253 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,253 reviews
Southwest
7.9
Good
4,253 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,008 reviews
Southwest
7.9
Good
4,253 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,095 reviews
Southwest
7.9
Good
4,253 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,050 reviews
Southwest
7.9
Good
4,253 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,084 reviews
Southwest
7.9
Good
4,253 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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, 125 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 9h 28m. Frontier provides one of the quickest options available for as low as $243. The distance between Philadelphia and Colorado is about 1740 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 $65 on Frontier. Other airlines that offer cheap prices include American Airlines from $87 and Southwest from $93 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 - Aspen Pitkin County or Philadelphia - Vail Eagle 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 (92%), Frontier (88%).

  • What are the cheapest flights from Philadelphia to Colorado?

    The cheapest flight price from Philadelphia to Colorado is $78. On average you can expect to pay $935. The most popular route, (Philadelphia - Denver Intl), can usually be booked for $152.

  • 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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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 diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$106Average$194FlexibilityNo cancel feeOn-time88%
FrontierCheapest$118Average$226FlexibilityNo cancel feeOn-time62%
DeltaCheapest$134Average$402FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$177Average$275FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$192Average$514FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$198Average$468FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$204Average$477FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$207Average$260FlexibilityNo cancel feeOn-time62%

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