$146+ 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
Aug 8 — Aug 151
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Fort Collins 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.Cheapflights Tip: The best prices from Philadelphia to Fort Collins are usually found in August or January, booked 33 days in advance, depart on a Friday or Saturday and return on a Friday
Cheap flight deals from Philadelphia to Fort Collins
Cheapest
Best
Last-minute
One-way
Cheapest flights from Philadelphia to Fort CollinsExplore 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 July 9, 2026.
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 July 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/5. 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 8/14:30 pm
PHL
- DEN
1 stop7h 58m
Frontier
Fri 8/711:59 pm
DEN
- PHL
1 stop6h 40m
Frontier
Deal found 7/5![Frontier logo]()
$253
This Cheapflightsfares deal was found by Cheapflights users on 7/6. 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 8/57:20 am
PHL
- DEN
1 stop8h 59m
Frontier
Sat 8/86:05 am
DEN
- PHL
Nonstop3h 44m
Frontier
Deal found 7/6![Frontier logo]()
$254
This Travelocity deal was found by Cheapflights users on 7/6. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:00 am
PHL
- DEN
1 stop7h 55m
Multiple Airlines
Wed 9/3011:59 pm
DEN
- PHL
1 stop9h 34m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 7/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/294:30 pm
PHL
- DEN
1 stop7h 35m
Frontier
Sun 8/211:46 pm
DEN
- PHL
1 stop29h 29m
Frontier
Deal found 7/6![Frontier logo]()
$256
This Frontier deal was found by Cheapflights users on 7/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/164:34 pm
PHL
- DEN
1 stop8h 21m
Frontier
Sat 8/2211:59 pm
DEN
- PHL
Nonstop3h 40m
Frontier
Deal found 7/9![Frontier logo]()
$257
This Cheapflightsfares deal was found by Cheapflights users on 7/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/412:44 pm
PHL
- DEN
Nonstop4h 14m
Frontier
Wed 8/126:05 am
DEN
- PHL
Nonstop3h 44m
Frontier
Deal found 7/7![Frontier logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Tue 8/44:30 pm
PHL
- DEN
1 stop7h 35m
Frontier
Fri 8/710:00 am
DEN
- PHL
1 stop7h 20m
Frontier
Deal found 7/8![Frontier logo]()
$259
This Super.com deal was found by Cheapflights users on 7/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/412:44 pm
PHL
- DEN
Nonstop4h 14m
Frontier
Thu 8/611:59 pm
DEN
- PHL
Nonstop3h 40m
Frontier
Deal found 7/8![Frontier logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 7/7. 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.
Thu 8/67:47 pm
PHL
- DEN
1 stop21h 36m
Multiple Airlines
Sat 8/86:05 am
DEN
- PHL
Nonstop3h 44m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Thu 8/138:30 am
PHL
- DEN
2 stops14h 39m
Frontier
Mon 8/1710:00 am
DEN
- PHL
1 stop7h 20m
Frontier
Deal found 7/8![Frontier logo]()
$262
This Southwest deal was found by Cheapflights users on 7/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:35 pm
PHL
- DEN
1 stop5h 25m
Southwest
Tue 8/186:35 am
DEN
- PHL
2 stops7h 25m
Southwest
Deal found 7/9![Southwest logo]()
$263
This Delta deal was found by Cheapflights users on 7/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/145:16 pm
PHL
- DEN
1 stop9h 20m
Delta
Mon 8/1712:50 am
DEN
- PHL
1 stop6h 48m
Delta
Deal found 7/8![Delta logo]()
$264
Best flights from Philadelphia to Fort CollinsDiscover carefully curated flight deals from Philadelphia to Fort Collins that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 9, 2026.
Discover carefully curated flight deals from Philadelphia to Fort Collins that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 9, 2026.
This Delta deal was found by Cheapflights users on 7/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/145:16 pm
PHL
- DEN
1 stop9h 20m
Delta
Mon 8/1712:50 am
DEN
- PHL
1 stop6h 48m
Delta
Deal found 7/8![Delta logo]()
$264
This Southwest deal was found by Cheapflights users on 7/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:55 am
PHL
- DEN
2 stops9h 50m
Southwest
Tue 9/18:35 am
DEN
- PHL
2 stops7h 25m
Southwest
Deal found 7/7![Southwest logo]()
$269
This United Airlines deal was found by Cheapflights users on 7/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/147:40 pm
PHL
- DEN
1 stop6h 50m
United Airlines
Tue 8/1811:59 pm
DEN
- PHL
1 stop7h 44m
United Airlines
Deal found 7/9![United Airlines logo]()
$361
This Southwest deal was found by Cheapflights users on 7/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:20 am
PHL
- DEN
2 stops6h 40m
Southwest
Tue 8/186:35 am
DEN
- PHL
2 stops7h 25m
Southwest
Deal found 7/7![Southwest logo]()
$308
This Southwest deal was found by Cheapflights users on 7/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/157:55 am
PHL
- DEN
2 stops7h 40m
Southwest
Fri 9/1811:50 am
DEN
- PHL
2 stops8h 10m
Southwest
Deal found 7/8![Southwest logo]()
$308
This Delta deal was found by Cheapflights users on 7/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:45 am
PHL
- DEN
1 stop6h 12m
Delta
Fri 10/912:59 am
DEN
- PHL
1 stop5h 46m
Delta
Deal found 7/6![Delta logo]()
$353
This Southwest deal was found by Cheapflights users on 7/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:55 am
PHL
- DEN
2 stops9h 50m
Southwest
Sat 8/226:20 pm
DEN
- PHL
2 stops14h 50m
Southwest
Deal found 7/8![Southwest logo]()
$335
This Southwest deal was found by Cheapflights users on 7/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:10 pm
PHL
- DEN
1 stop8h 35m
Southwest
Mon 10/125:50 am
DEN
- PHL
1 stop6h 05m
Southwest
Deal found 7/9![Southwest logo]()
$336
This Southwest deal was found by Cheapflights users on 7/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/116:00 am
PHL
- DEN
1 stop5h 50m
Southwest
Sun 12/138:10 am
DEN
- PHL
2 stops8h 35m
Southwest
Deal found 7/9![Southwest logo]()
$371
This Southwest deal was found by Cheapflights users on 7/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/296:15 am
PHL
- DEN
2 stops11h 35m
Southwest
Wed 1/67:30 am
DEN
- PHL
1 stop6h 55m
Southwest
Deal found 7/4![Southwest logo]()
$381
Last-minute flights from Philadelphia to Fort CollinsDiscover last-minute flight deals from Philadelphia to Fort Collins. Data last updated July 9, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Fort Collins. Data last updated July 9, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/294:30 pm
PHL
- DEN
1 stop7h 35m
Frontier
Sun 8/211:46 pm
DEN
- PHL
1 stop29h 29m
Frontier
Deal found 7/6![Frontier logo]()
$256
This Kiwi.com deal was found by Cheapflights users on 7/5. 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 8/14:30 pm
PHL
- DEN
1 stop7h 58m
Frontier
Fri 8/711:59 pm
DEN
- PHL
1 stop6h 40m
Frontier
Deal found 7/5![Frontier logo]()
$253
This Cheapflightsfares deal was found by Cheapflights users on 7/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/412:44 pm
PHL
- DEN
Nonstop4h 14m
Frontier
Wed 8/126:05 am
DEN
- PHL
Nonstop3h 44m
Frontier
Deal found 7/7![Frontier logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Tue 8/44:30 pm
PHL
- DEN
1 stop7h 35m
Frontier
Fri 8/710:00 am
DEN
- PHL
1 stop7h 20m
Frontier
Deal found 7/8![Frontier logo]()
$259
This Super.com deal was found by Cheapflights users on 7/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/412:44 pm
PHL
- DEN
Nonstop4h 14m
Frontier
Thu 8/611:59 pm
DEN
- PHL
Nonstop3h 40m
Frontier
Deal found 7/8![Frontier logo]()
$260
This Cheapflightsfares deal was found by Cheapflights users on 7/6. 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 8/57:20 am
PHL
- DEN
1 stop8h 59m
Frontier
Sat 8/86:05 am
DEN
- PHL
Nonstop3h 44m
Frontier
Deal found 7/6![Frontier logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 7/7. 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.
Thu 8/67:47 pm
PHL
- DEN
1 stop21h 36m
Multiple Airlines
Sat 8/86:05 am
DEN
- PHL
Nonstop3h 44m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$261
This Expedia deal was found by Cheapflights users on 7/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/912:44 pm
PHL
- DEN
Nonstop4h 14m
Frontier
Fri 8/1411:59 pm
DEN
- PHL
Nonstop3h 40m
Frontier
Deal found 7/9![Frontier logo]()
$255
This Southwest deal was found by Cheapflights users on 7/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:35 pm
PHL
- DEN
1 stop5h 25m
Southwest
Tue 8/186:35 am
DEN
- PHL
2 stops7h 25m
Southwest
Deal found 7/9![Southwest logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Thu 8/138:30 am
PHL
- DEN
2 stops14h 39m
Frontier
Mon 8/1710:00 am
DEN
- PHL
1 stop7h 20m
Frontier
Deal found 7/8![Frontier logo]()
$262
This Delta deal was found by Cheapflights users on 7/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/145:16 pm
PHL
- DEN
1 stop9h 20m
Delta
Mon 8/1712:50 am
DEN
- PHL
1 stop6h 48m
Delta
Deal found 7/8![Delta logo]()
$264
This Frontier deal was found by Cheapflights users on 7/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:05 pm
PHL
- DEN
1 stop7h 52m
Frontier
Mon 8/2411:59 pm
DEN
- PHL
Nonstop3h 40m
Frontier
Deal found 7/9![Frontier logo]()
$257
One-way flights from Philadelphia to Fort CollinsSearch for one-way flight options from Philadelphia to Fort Collins. Find affordable one-way fares based on user searches. Data last updated July 9, 2026.
Search for one-way flight options from Philadelphia to Fort Collins. Find affordable one-way fares based on user searches. Data last updated July 9, 2026.
This Delta deal was found by Cheapflights users on 7/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/283:58 pm
PHL
- DEN
1 stop8h 07m
Delta
Deal found 7/9![Delta logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
Sat 8/86:05 pm
PHL
- DEN
1 stop7h 52m
Frontier
Deal found 7/9![Frontier logo]()
$147
This Super.com deal was found by Cheapflights users on 7/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1412:44 pm
PHL
- DEN
Nonstop4h 14m
Frontier
Deal found 7/6![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Thu 8/68:30 am
PHL
- DEN
2 stops15h 14m
Frontier
Deal found 7/8![Frontier logo]()
$149
This Trip.com deal was found by Cheapflights users on 7/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:25 am
PHL
- DEN
1 stop9h 36m
Frontier
Deal found 7/6![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 8/76:25 am
PHL
- DEN
2 stops11h 29m
Frontier
Deal found 7/7![Frontier logo]()
$152
This Cheapflightsfares deal was found by Cheapflights users on 7/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/168:37 pm
PHL
- DEN
Nonstop4h 27m
Frontier
Deal found 7/8![Frontier logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 7/5. 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.
Fri 8/146:25 am
PHL
- DEN
2 stops11h 29m
Frontier
Deal found 7/5![Frontier logo]()
$155
This United Airlines deal was found by Cheapflights users on 7/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/73:48 pm
PHL
- DEN
Nonstop4h 07m
United Airlines
Deal found 7/8![United Airlines logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
Mon 10/59:14 am
PHL
- DEN
2 stops12h 50m
Frontier
Deal found 7/9![Frontier logo]()
$157
This Cheapflightsfares deal was found by Cheapflights users on 7/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2812:44 pm
PHL
- DEN
Nonstop4h 14m
Frontier
Deal found 7/7![Frontier logo]()
$158
Find 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 July 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $253 (Kiwi.com) |
One-way from | $146 (Delta) |
Popular in | June |
Cheapest in | August |
Average price | $345 |
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 July 9, 2026.
Use the filters below to find and compare flights from Philadelphia to Fort Collins that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Fri 8/14
5:16 pm-12:36 am
1 stop9h 20m
Denver Intl
Mon 8/17
12:50 am-9:38 am
1 stop6h 48m
$264
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Thu 8/27
5:55 am-1:45 pm
2 stops9h 50m
Denver Intl
Tue 9/1
8:35 am-6:00 pm
2 stops7h 25m
$269
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Fri 8/14
6:20 am-11:00 am
2 stops6h 40m
Denver Intl
Tue 8/18
6:35 am-4:00 pm
2 stops7h 25m
$308
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Tue 9/15
7:55 am-1:35 pm
2 stops7h 40m
Denver Intl
Fri 9/18
11:50 am-10:00 pm
2 stops8h 10m
$308
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Mon 8/17
5:55 am-1:45 pm
2 stops9h 50m
Denver Intl
Sat 8/22
6:20 pm-11:10 am
2 stops14h 50m
$335
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Thu 10/8
5:10 pm-11:45 pm
1 stop8h 35m
Denver Intl
Mon 10/12
5:50 am-1:55 pm
1 stop6h 05m
$336
Quickest round-trip
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Wed 10/7
5:45 am-9:57 am
1 stop6h 12m
Denver Intl
Fri 10/9
12:59 am-8:45 am
1 stop5h 46m
$353
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Fri 8/14
7:40 pm-12:30 am
1 stop6h 50m
Denver Intl
Tue 8/18
11:59 pm-9:43 am
1 stop7h 44m
$361
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Fri 12/11
6:00 am-9:50 am
1 stop5h 50m
Denver Intl
Sun 12/13
8:10 am-6:45 pm
2 stops8h 35m
$371
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Tue 12/29
6:15 am-3:50 pm
2 stops11h 35m
Denver Intl
Wed 1/6
7:30 am-4:25 pm
1 stop6h 55m
$381
Showing 1-10 of 21 resultsSorted by cheapest first
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.
PHL-DEN
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
PHL-FC9
PHL-DEN
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 July 9, 2026.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 37% on flights from Philadelphia to Fort Collins by exploring options for tickets in the evening.
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 July 9, 2026.
The most flights from PHL to FC9 are scheduled on a Thursday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).
How much does it cost to fly round-trip from Philadelphia to Fort Collins?
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 July 4, 2026.
Travelers seeking maximum savings on their Philadelphia to Fort Collins flight should consider departing on Tuesday evenings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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 July 9, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andAmerican 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.
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Overall
7.9
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
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Alternative routes for Philadelphia to Fort Collins
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Complete your trip
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Search flights from Philadelphia to Fort Collins by cabin class
Find flights from Philadelphia to Fort Collins, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Philadelphia and Fort Collins flights
Browse other Philadelphia and Fort Collins flight options. Last updated on July 9, 2026.
Other flights from Philadelphia
Browse through other flights departing from Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on July 9, 2026.
Popular flight searches
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Philadelphia to Fort Collins flights
Consider these flights traveling from Philadelphia to Fort Collins.
Top 6 airlines flying from Philadelphia to Fort Collins
Discover the top 6 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 July 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$243 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$196 | Average$420 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$201 | Average$389 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$216 | Average$415 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$220 | Average$308 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$237 | Average$416 | FlexibilityNo cancel fee | On-timeN/A |