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$107+ Cheap flights from Philadelphia (PHL) to Fort Collins, CO

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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
Feb 5 — Feb 121
Thu 2/5
Thu 2/12
1 adult, Economy
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Cheapflights Tip: The best prices from Philadelphia to Fort Collins are usually found in July or August, booked 40 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap flight deals from Philadelphia to Fort Collins

Keep the following information in mind while searching for Philadelphia to Fort Collins flight deals. Data was last updated January 6, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$144
(Frontier)

One-way from

$107
(Kiwi.com)

Popular in

December

Cheapest in

July

Average price

$329
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 Fort Collins
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One-way flight from Philadelphia to Fort Collins
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Highest demand for flights based on searches. 8% potential increase in price ($29 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 January 2026
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Find flight deals from Philadelphia to Fort Collins

Cheapest flights from Philadelphia to Fort Collins
Explore the most affordable flight options available from Philadelphia to Fort Collins. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 6, 2026.

This Frontier deal was found by Cheapflights users on 1/5. 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 2/195:42 pmPHL - DEN
Nonstop4h 30mFrontier
Thu 2/262:10 pmDEN - PHL
1 stop8h 51mFrontier
Deal found 1/5$144
This Kiwi.com deal was found by Cheapflights users on 1/4. 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 2/267:12 pmPHL - DEN
1 stop14h 27mFrontier
Wed 3/42:15 pmDEN - PHL
1 stop19h 03mFrontier
Deal found 1/4$146
This Cheapflightsfares deal was found by Cheapflights users on 1/6. 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 1/288:00 amPHL - DEN
1 stop26h 30mFrontier
Sat 1/316:00 amDEN - PHL
1 stop11h 13mFrontier
Deal found 1/6$147
This Frontier deal was found by Cheapflights users on 1/5. 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 2/2111:52 amPHL - DEN
1 stop10h 41mFrontier
Wed 2/2511:59 pmDEN - PHL
1 stop9h 42mFrontier
Deal found 1/5$148
This Frontier deal was found by Cheapflights users on 1/5. 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 2/1410:59 pmPHL - DEN
1 stop10h 56mFrontier
Sun 2/1511:05 amDEN - PHL
Nonstop3h 32mFrontier
Deal found 1/5$149
This Kiwi.com deal was found by Cheapflights users on 1/4. 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 1/258:45 amPHL - DEN
1 stop15h 04mFrontier
Tue 2/36:32 pmDEN - PHL
1 stop14h 05mFrontier
Deal found 1/4$151
This Kiwi.com deal was found by Cheapflights users on 1/4. 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 1/271:40 pmPHL - DEN
2 stops24h 39mMultiple Airlines
Wed 2/43:07 pmDEN - PHL
1 stop24h 23mMultiple Airlines
Deal found 1/4$152
This Cheapflightsfares deal was found by Cheapflights users on 1/6. 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 2/137:05 pmPHL - DEN
Nonstop4h 37mFrontier
Tue 2/1711:59 pmDEN - PHL
1 stop20h 09mFrontier
Deal found 1/6$153
This Frontier deal was found by Cheapflights users on 1/5. 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 2/277:05 pmPHL - DEN
Nonstop4h 37mFrontier
Mon 3/211:05 amDEN - PHL
1 stop9h 47mFrontier
Deal found 1/5$154
This Kiwi.com deal was found by Cheapflights users on 1/4. 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.
Wed 1/286:00 amPHL - DEN
1 stop8h 19mMultiple Airlines
Wed 2/43:07 pmDEN - PHL
1 stop23h 42mMultiple Airlines
Deal found 1/4$155
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 2/76:18 pmPHL - DEN
2 stops16h 08mMultiple Airlines
Thu 2/1211:05 amDEN - PHL
Nonstop3h 32mMultiple Airlines
Deal found 1/5$156

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Fort Collins 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 January 6, 2026.
Use the filters below to find and compare flights from Philadelphia to Fort Collins that are best for you.

Fly from

Philadelphia

Fly to

Fort Collins

Route

Depart

Return

Price

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 2/26

6:05 am-8:30 am

Nonstop4h 25m

Denver Intl

Tue 3/3

10:50 am-4:20 pm

Nonstop3h 30m

$217

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 2/14

3:37 pm-6:07 pm

Nonstop4h 30m

Denver Intl

Fri 2/20

5:57 pm-11:30 pm

Nonstop3h 33m

$217

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 1/29

10:10 am-3:52 pm

1 stop7h 42m

Denver Intl

Mon 2/2

5:55 pm-11:30 pm

Nonstop3h 35m

$227

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 2/4

5:45 pm-9:40 pm

1 stop5h 55m

Denver Intl

Wed 2/11

4:35 pm-10:00 pm

Nonstop3h 25m

$232

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 2/7

3:43 pm-6:12 pm

Nonstop4h 29m

Denver Intl

Wed 2/11

5:55 pm-11:32 pm

Nonstop3h 37m

$233

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 3/12

7:36 pm-12:09 am

1 stop6h 33m

Denver Intl

Tue 3/17

2:39 pm-11:59 pm

1 stop7h 20m

$237

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 4/2

11:36 am-4:24 pm

1 stop6h 48m

Denver Intl

Mon 4/6

11:59 pm-9:58 am

1 stop7h 59m

$237

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 2/21

3:37 pm-6:07 pm

Nonstop4h 30m

Denver Intl

Sat 2/28

5:50 pm-11:23 pm

Nonstop3h 33m

$237

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 1/28

5:00 pm-9:59 pm

1 stop6h 59m

Denver Intl

Sat 1/31

5:55 pm-11:30 pm

Nonstop3h 35m

$243

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 1/28

1:50 pm-7:20 pm

1 stop7h 30m

Denver Intl

Sat 1/31

10:00 am-3:40 pm

Nonstop3h 40m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 23 results
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Best time to book a flight from Philadelphia to Fort Collins

Have a flexible travel schedule? Discover the best time to fly to Fort Collins 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 Fort Collins

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

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Fort Collins. Price data was last updated on January 2, 2026.

To ensure you get the cheapest price possible for a flight from Philadelphia to Fort Collins, you should look to book at least 40 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 Fort Collins?

Currently, October is the cheapest month in which you can book a flight from Philadelphia to Fort Collins (average of $88). Flying from Philadelphia to Fort Collins 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 FC9?

Find hourly flight availability from Philadelphia to Fort Collins. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 6, 2026.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 35% on flights from Philadelphia to Fort Collins by exploring options for tickets at noon.

What is the cheapest day to fly from Philadelphia to Fort Collins?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Fort Collins. Price data was last updated on January 3, 2026.

Travelers seeking maximum savings on their Philadelphia to Fort Collins flight should consider departing on Friday at noon 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 Fort Collins

Explore weekly flight availability from Philadelphia to Fort Collins. 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 January 6, 2026.

The most flights from PHL to FC9 are scheduled on a Tuesday (9 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (5 on average).

Reviews of airlines servicing Fort Collins

Get insights into the airlines that provide service to Fort Collins. 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 Fort Collins. Reviews last updated January 6, 2026.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Philadelphia to Fort Collins by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Overall

8.0

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
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Overall

8.0

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
8,018 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Overall

8.0

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
9,132 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Overall

8.0

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
11,084 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Overall

8.0

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
5.7
Fair
3,063 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Overall

8.0

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 Fort Collins. 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 Fort Collins?

    If you book a flight to Fort Collins from Philadelphia, you will be flying from Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia. There are 6 flights from Philadelphia to Fort Collins per day from 7 different airlines.

  • How popular is this Philadelphia to Fort Collins flight route?

    Flights from Philadelphia to Fort Collins have been viewed 126 times in the past calendar month.

  • How long is the flight from Philadelphia to Fort Collins?

    Southwest and United Airlines can get you from Philadelphia to Fort Collins in just under 4h 25m. Your travel time will be generally consistent. There are 1553 mi between Philadelphia and Fort Collins. All flights are typically nonstop.

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

    $65 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on JetBlue and American Airlines, with prices starting from $79 and $86, respectively.

  • What are the most reliable airlines from Philadelphia to Fort Collins?

    Before booking your flight to Fort Collins from Philadelphia, check out the most reliable airlines to get you to your destination on time: United Airlines (88%), Air Canada (84%), Qatar Airways( 69%).

  • What are the cheapest flights from Philadelphia to Fort Collins?

    Looking for the cheapest flight from Philadelphia to Fort Collins? While on average our users pay $804, our data indicates the cheapest price to be $121. The most popular route (Philadelphia - Denver Intl), is priced around $155.

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

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

  • How can I find direct flights from Philadelphia to Fort Collins?

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

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

    Yes. Cheapflights offers flight deals from Philadelphia to Fort Collins 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 Fort Collins?

    Currently, October is the cheapest month in which you can book a flight from Philadelphia to Fort Collins (average of $88). Flying from Philadelphia to Fort Collins 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 Fort Collins

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Philadelphia to Fort Collins

Discover the top 7 airlines that operate flights from Philadelphia to Fort Collins. 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 January 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$106Average$194FlexibilityNo cancel feeOn-time88%
FrontierCheapest$119Average$225FlexibilityNo cancel feeOn-time62%
DeltaCheapest$128Average$304FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$191Average$406FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$198Average$347FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$201Average$370FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$208Average$306FlexibilityNo cancel feeOn-time62%

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