$95+ 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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
Mar 14 — Mar 211
1 adult, Economy
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Find cheap flights from Philadelphia to Colorado 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
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Cheapest flights from Philadelphia to ColoradoExplore 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 February 12, 2026.
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 February 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Wed 2/253:45 pm
PHL
- DEN
1 stop9h 14m
Frontier
Mon 3/211:25 pm
DEN
- PHL
1 stop9h 46m
Frontier
Deal found 2/9![Frontier logo]()
$170
This Super.com deal was found by Cheapflights users on 2/9. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/15:47 pm
PHL
- DEN
Nonstop4h 30m
Frontier
Mon 3/212:59 am
DEN
- PHL
1 stop7h 28m
Frontier
Deal found 2/9![Frontier logo]()
$171
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/55:40 am
PHL
- DEN
1 stop8h 04m
Frontier
Mon 3/911:59 pm
DEN
- PHL
Nonstop3h 32m
Frontier
Deal found 2/10![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 3/15:47 pm
PHL
- DEN
Nonstop4h 30m
Frontier
Mon 3/211:25 pm
DEN
- PHL
1 stop9h 46m
Frontier
Deal found 2/9![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Tue 3/312:21 pm
PHL
- DEN
1 stop22h 50m
Frontier
Thu 3/59:06 pm
DEN
- PHL
2 stops35h 53m
Frontier
Deal found 2/10![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 2/12. 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 3/255:05 am
PHL
- DEN
1 stop9h 04m
Frontier
Sun 3/2911:59 pm
DEN
- PHL
1 stop6h 08m
Frontier
Deal found 2/12![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Tue 3/176:12 pm
PHL
- DEN
1 stop16h 14m
Multiple Airlines
Tue 3/246:01 pm
DEN
- PHL
2 stops29h 14m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 2/11. 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.
Mon 3/238:25 pm
PHL
- DEN
Nonstop4h 39m
Frontier
Wed 3/2511:59 pm
DEN
- PHL
1 stop6h 08m
Frontier
Deal found 2/11![Frontier logo]()
$177
This Cheapflightsfares deal was found by Cheapflights users on 2/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1112:04 pm
PHL
- DEN
1 stop10h 51m
Frontier
Mon 3/1611:59 pm
DEN
- PHL
Nonstop3h 32m
Frontier
Deal found 2/9![Frontier logo]()
$178
This Frontier deal was found by Cheapflights users on 2/9. 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.
Thu 4/98:25 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Sat 4/1110:20 am
DEN
- PHL
1 stop8h 31m
Frontier
Deal found 2/9![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 2/12. 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 4/38:33 pm
PHL
- DEN
1 stop12h 27m
Frontier
Fri 4/106:00 am
DEN
- PHL
1 stop8h 39m
Frontier
Deal found 2/12![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 2/10. 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.
Fri 4/38:25 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Thu 4/911:56 pm
DEN
- PHL
Nonstop3h 35m
Frontier
Deal found 2/10![Frontier logo]()
$181
Best flights from Philadelphia to ColoradoDiscover carefully curated flight deals from Philadelphia to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 12, 2026.
Discover carefully curated flight deals from Philadelphia to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 12, 2026.
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Tue 3/178:00 am
PHL
- DEN
Nonstop4h 32m
United Airlines
Tue 3/245:57 pm
DEN
- PHL
Nonstop3h 35m
United Airlines
Deal found 2/9![United Airlines logo]()
$219
This Southwest deal was found by Cheapflights users on 2/8. 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.
Wed 3/185:30 am
PHL
- DEN
Nonstop4h 10m
Southwest
Sat 3/283:10 pm
DEN
- PHL
1 stop6h 15m
Southwest
Deal found 2/8![Southwest logo]()
$237
This JetBlue deal was found by Cheapflights users on 2/10. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:00 am
PHL
- HDN
1 stop8h 46m
JetBlue
Wed 3/41:35 pm
HDN
- PHL
1 stop8h 09m
JetBlue
Deal found 2/10![JetBlue logo]()
$281
This American Airlines deal was found by Cheapflights users on 2/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/263:55 pm
PHL
- GJT
1 stop7h 28m
American Airlines
Mon 3/24:46 pm
GJT
- PHL
1 stop6h 08m
American Airlines
Deal found 2/11![American Airlines logo]()
$299
This Delta deal was found by Cheapflights users on 2/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/66:25 pm
PHL
- DEN
1 stop7h 44m
Delta
Fri 4/1012:35 am
DEN
- PHL
1 stop6h 11m
Delta
Deal found 2/10![Delta logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 2/11. 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.
Thu 2/265:47 pm
PHL
- ALS
1 stop26h 38m
Multiple Airlines
Mon 3/22:00 pm
ALS
- PHL
2 stops18h 27m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$462
This Southwest deal was found by Cheapflights users on 2/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/75:30 am
PHL
- DEN
Nonstop4h 10m
Southwest
Wed 3/115:05 am
DEN
- PHL
1 stop6h 25m
Southwest
Deal found 2/10![Southwest logo]()
$268
This JetBlue deal was found by Cheapflights users on 2/9. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/283:15 pm
PHL
- DEN
1 stop8h 24m
JetBlue
Mon 6/110:34 pm
DEN
- PHL
1 stop8h 39m
JetBlue
Deal found 2/9![JetBlue logo]()
$290
This United Airlines deal was found by Cheapflights users on 2/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/28:00 am
PHL
- DEN
Nonstop4h 30m
United Airlines
Tue 3/105:57 pm
DEN
- PHL
Nonstop3h 35m
United Airlines
Deal found 2/11![United Airlines logo]()
$295
This Southwest deal was found by Cheapflights users on 2/9. 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.
Wed 3/255:30 am
PHL
- DEN
Nonstop4h 10m
Southwest
Sat 3/288:10 am
DEN
- PHL
1 stop7h 20m
Southwest
Deal found 2/9![Southwest logo]()
$271
This American Airlines deal was found by Cheapflights users on 2/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/55:00 am
PHL
- MTJ
1 stop8h 34m
American Airlines
Mon 3/92:38 pm
MTJ
- PHL
1 stop8h 16m
American Airlines
Deal found 2/10![American Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 2/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:00 am
PHL
- COS
1 stop6h 25m
Delta
Sat 3/71:22 pm
COS
- PHL
1 stop6h 49m
Delta
Deal found 2/10![Delta logo]()
$310
This JetBlue deal was found by Cheapflights users on 2/11. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/293:15 pm
PHL
- DEN
1 stop8h 24m
JetBlue
Mon 6/110:34 pm
DEN
- PHL
1 stop8h 39m
JetBlue
Deal found 2/11![JetBlue logo]()
$290
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Fri 5/159:55 am
PHL
- DEN
Nonstop4h 21m
United Airlines
Fri 5/155:59 pm
DEN
- PHL
Nonstop3h 44m
United Airlines
Deal found 2/8![United Airlines logo]()
$303
This American Airlines deal was found by Cheapflights users on 2/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/45:00 am
PHL
- MTJ
1 stop8h 34m
American Airlines
Mon 3/92:38 pm
MTJ
- PHL
1 stop8h 16m
American Airlines
Deal found 2/10![American Airlines logo]()
$304
This Southwest deal was found by Cheapflights users on 2/8. 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.
Sat 4/46:15 am
PHL
- DEN
2 stops6h 45m
Southwest
Tue 4/76:50 am
DEN
- PHL
2 stops8h 00m
Southwest
Deal found 2/8![Southwest logo]()
$287
This United Airlines deal was found by Cheapflights users on 2/12. 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.
Sat 3/79:55 am
PHL
- DRO
2 stops12h 45m
United Airlines
Tue 3/101:41 pm
DRO
- PHL
1 stop7h 51m
United Airlines
Deal found 2/12![United Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/128:00 am
PHL
- COS
1 stop6h 48m
Delta
Tue 5/196:00 am
COS
- PHL
1 stop8h 12m
Delta
Deal found 2/11![Delta logo]()
$338
This deal was found by Cheapflights users on 2/10. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/136:00 am
PHL
- HDN
1 stop7h 23m
JetBlue
Thu 3/1912:18 pm
HDN
- PHL
1 stop8h 13m
JetBlue
Deal found 2/10![JetBlue logo]()
$310
This United Airlines deal was found by Cheapflights users on 2/12. 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.
Sun 3/16:27 am
PHL
- HDN
2 stops8h 05m
United Airlines
Sat 3/77:00 am
HDN
- PHL
2 stops8h 14m
United Airlines
Deal found 2/12![United Airlines logo]()
$307
This American Airlines deal was found by Cheapflights users on 2/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/217:00 am
PHL
- MTJ
1 stop8h 56m
American Airlines
Sat 3/282:38 pm
MTJ
- PHL
1 stop8h 16m
American Airlines
Deal found 2/10![American Airlines logo]()
$348
This Southwest deal was found by Cheapflights users on 2/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/15:30 am
PHL
- MTJ
1 stop8h 15m
Southwest
Wed 4/88:45 am
MTJ
- PHL
2 stops11h 15m
Southwest
Deal found 2/11![Southwest logo]()
$319
This Delta deal was found by Cheapflights users on 2/12. 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.
Mon 3/96:54 am
PHL
- EGE
1 stop9h 17m
Delta
Wed 3/183:31 pm
EGE
- PHL
1 stop7h 26m
Delta
Deal found 2/12![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 2/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/283:37 pm
PHL
- HDN
1 stop6h 50m
United Airlines
Sat 3/77:00 am
HDN
- PHL
2 stops8h 14m
United Airlines
Deal found 2/11![United Airlines logo]()
$307
This American Airlines deal was found by Cheapflights users on 2/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/262:00 pm
PHL
- ASE
1 stop8h 54m
American Airlines
Mon 3/304:36 pm
ASE
- PHL
1 stop6h 18m
American Airlines
Deal found 2/11![American Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 2/12. 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 3/116:54 am
PHL
- EGE
1 stop9h 17m
Delta
Mon 3/163:31 pm
EGE
- PHL
1 stop7h 26m
Delta
Deal found 2/12![Delta logo]()
$359
This Southwest deal was found by Cheapflights users on 2/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/46:40 am
PHL
- MTJ
1 stop7h 20m
Southwest
Mon 3/91:40 pm
MTJ
- PHL
2 stops7h 55m
Southwest
Deal found 2/10![Southwest logo]()
$331
This United Airlines deal was found by Cheapflights users on 2/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2510:35 am
PHL
- HDN
2 stops11h 52m
United Airlines
Fri 3/612:01 pm
HDN
- PHL
1 stop7h 08m
United Airlines
Deal found 2/11![United Airlines logo]()
$309
This American Airlines deal was found by Cheapflights users on 2/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/72:57 pm
PHL
- ASE
1 stop8h 16m
American Airlines
Wed 3/117:00 am
ASE
- PHL
1 stop8h 55m
American Airlines
Deal found 2/12![American Airlines logo]()
$359
This Southwest deal was found by Cheapflights users on 2/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:05 am
PHL
- HDN
1 stop6h 35m
Southwest
Sat 3/711:00 am
HDN
- PHL
1 stop11h 20m
Southwest
Deal found 2/11![Southwest logo]()
$334
Last-minute flights from Philadelphia to ColoradoDiscover last-minute flight deals from Philadelphia to Colorado. Data last updated February 12, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Colorado. Data last updated February 12, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Tue 2/244:14 pm
PHL
- DEN
1 stop8h 45m
Multiple Airlines
Tue 3/311:59 am
DEN
- PHL
2 stops18h 45m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Wed 2/253:45 pm
PHL
- DEN
1 stop9h 14m
Frontier
Mon 3/211:25 pm
DEN
- PHL
1 stop9h 46m
Frontier
Deal found 2/9![Frontier logo]()
$170
This Frontier deal was found by Cheapflights users on 2/9. 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.
Fri 2/278:27 pm
PHL
- DEN
1 stop14h 44m
Frontier
Fri 3/611:59 pm
DEN
- PHL
Nonstop3h 32m
Frontier
Deal found 2/9![Frontier logo]()
$179
This Super.com deal was found by Cheapflights users on 2/9. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/15:47 pm
PHL
- DEN
Nonstop4h 30m
Frontier
Tue 3/312:59 am
DEN
- PHL
1 stop7h 25m
Frontier
Deal found 2/9![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 3/15:47 pm
PHL
- DEN
Nonstop4h 30m
Frontier
Mon 3/211:25 pm
DEN
- PHL
1 stop9h 46m
Frontier
Deal found 2/9![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Tue 3/312:21 pm
PHL
- DEN
1 stop22h 50m
Frontier
Thu 3/59:06 pm
DEN
- PHL
2 stops35h 53m
Frontier
Deal found 2/10![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Wed 3/49:39 am
PHL
- DEN
1 stop25h 52m
Multiple Airlines
Mon 3/910:20 am
DEN
- PHL
1 stop10h 48m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$181
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/55:40 am
PHL
- DEN
1 stop8h 04m
Frontier
Mon 3/911:59 pm
DEN
- PHL
Nonstop3h 32m
Frontier
Deal found 2/10![Frontier logo]()
$172
This Cheapflightsfares deal was found by Cheapflights users on 2/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1112:04 pm
PHL
- DEN
1 stop10h 51m
Frontier
Mon 3/1611:59 pm
DEN
- PHL
Nonstop3h 32m
Frontier
Deal found 2/9![Frontier logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Tue 3/176:12 pm
PHL
- DEN
1 stop16h 14m
Multiple Airlines
Tue 3/246:01 pm
DEN
- PHL
2 stops29h 14m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 2/11. 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.
Mon 3/238:25 pm
PHL
- DEN
Nonstop4h 39m
Frontier
Wed 3/2511:59 pm
DEN
- PHL
1 stop6h 08m
Frontier
Deal found 2/11![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 2/12. 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 3/255:05 am
PHL
- DEN
1 stop9h 04m
Frontier
Sun 3/2911:59 pm
DEN
- PHL
1 stop6h 08m
Frontier
Deal found 2/12![Frontier logo]()
$175
One-way flights from Philadelphia to ColoradoSearch for one-way flight options from Philadelphia to Colorado. Find affordable one-way fares based on user searches. Data last updated February 12, 2026.
Search for one-way flight options from Philadelphia to Colorado. Find affordable one-way fares based on user searches. Data last updated February 12, 2026.
This Frontier deal was found by Cheapflights users on 2/10. 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.
Sun 4/195:05 am
PHL
- DEN
1 stop9h 04m
Frontier
Deal found 2/10![Frontier logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 2/12. 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 4/48:25 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 2/12![Frontier logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 2/11. 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.
Mon 3/97:10 pm
PHL
- DEN
1 stop18h 49m
Frontier
Deal found 2/11![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 2/11. 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.
Wed 3/115:15 am
PHL
- DEN
2 stops13h 22m
Frontier
Deal found 2/11![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 2/12. 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 4/72:09 pm
PHL
- DEN
2 stops21h 31m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Wed 4/82:09 pm
PHL
- DEN
2 stops32h 01m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Fri 4/38:25 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 2/10![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Mon 4/69:37 pm
PHL
- DEN
1 stop27h 27m
Frontier
Deal found 2/10![Frontier logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 2/11. 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.
Thu 4/163:41 pm
PHL
- DEN
1 stop9h 10m
Frontier
Deal found 2/11![Frontier logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Tue 3/105:26 pm
PHL
- DEN
2 stops15h 47m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$105
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/38:25 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 2/10![Frontier logo]()
$107
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Thu 3/126:30 am
PHL
- MTJ
1 stop7h 32m
United Airlines
Deal found 2/10![United Airlines logo]()
$125
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 February 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $170 (Kiwi.com) |
One-way from | $95 (Frontier) |
Popular in | December |
Cheapest in | July |
Average price | $333 |
Good round-trip deal | $316 or less |
Good one-way deal | $166 or less |
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 February 12, 2026.
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
Tue 3/17
8:00 am-10:32 am
Nonstop4h 32m
Denver Intl
Tue 3/24
5:57 pm-11:32 pm
Nonstop3h 35m
$219
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Wed 3/18
5:30 am-7:40 am
Nonstop4h 10m
Denver Intl
Sat 3/28
3:10 pm-11:25 pm
1 stop6h 15m
$237
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Sat 3/7
5:30 am-7:40 am
Nonstop4h 10m
Denver Intl
Wed 3/11
5:05 am-1:30 pm
1 stop6h 25m
$268
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Wed 3/25
5:30 am-7:40 am
Nonstop4h 10m
Denver Intl
Sat 3/28
8:10 am-5:30 pm
1 stop7h 20m
$271
PhiladelphiaHayden
PHL - HDN
PHLHDN
Philadelphia
Tue 3/3
6:00 am-12:46 pm
1 stop8h 46m
Hayden Yampa Valley
Wed 3/4
1:35 pm-11:44 pm
1 stop8h 09m
$281
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Sat 4/4
6:15 am-11:00 am
2 stops6h 45m
Denver Intl
Tue 4/7
6:50 am-4:50 pm
2 stops8h 00m
$287
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Thu 5/28
3:15 pm-9:39 pm
1 stop8h 24m
Denver Intl
Mon 6/1
10:34 pm-9:13 am
1 stop8h 39m
$290
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Fri 5/29
3:15 pm-9:39 pm
1 stop8h 24m
Denver Intl
Mon 6/1
10:34 pm-9:13 am
1 stop8h 39m
$290
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Mon 3/2
8:00 am-10:30 am
Nonstop4h 30m
Denver Intl
Tue 3/10
5:57 pm-11:32 pm
Nonstop3h 35m
$295
PhiladelphiaGrand Junction
PHL - GJT
PHLGJT
Philadelphia
Thu 2/26
3:55 pm-9:23 pm
1 stop7h 28m
Grand Junction Regnl
Mon 3/2
4:46 pm-12:54 am
1 stop6h 08m
$299
Showing 1-10 of 60 results
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.
PHL-DEN
PHL-MTJ
PHL-HDN
PHL-GJT
PHL-ALS
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
PHL-USCO
PHL-DEN
PHL-MTJ
PHL-HDN
PHL-GJT
What is the cheapest month to book a flight from Philadelphia to Colorado?
Currently, January is the cheapest month in which you can book a flight from Philadelphia to Colorado (average of $85). Flying from Philadelphia to Colorado in May is currently the most expensive (average of $139). 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 February 12, 2026.
It’s optimal to fly from Philadelphia to Colorado at noon. By choosing this option you can save up to 68% 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 February 7, 2026.
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. 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 February 12, 2026.
The most flights from PHL to USCO are scheduled on a Thursday (12 on average). You will have fewer flight options on Tuesday, 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 February 12, 2026.
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.
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
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 Colorado. 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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Complete your trip
Complete your trip to Colorado by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Philadelphia to Colorado, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Philadelphia and Colorado flights
Browse other Philadelphia and Colorado flight options. Last updated on February 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Philadelphia to Colorado flights
Consider these flights traveling from Philadelphia to Colorado.
Top 7 airlines flying from Philadelphia to Colorado
Discover the top 7 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 February 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$106 | Average$194 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$111 | Average$220 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$128 | Average$379 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$187 | Average$457 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$188 | Average$481 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$206 | Average$467 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$208 | Average$277 | FlexibilityNo cancel fee | On-time62% |