$138+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
Jul 27 — Aug 31
Round-trip
1 adult, Economy
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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 June 27, 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 June 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 8/81:32 pm
PHL
- DEN
1 stop10h 56m
Frontier
Tue 8/1811:59 pm
DEN
- PHL
Nonstop3h 40m
Frontier
Deal found 6/23![Frontier logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 6/22. 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
Tue 8/116:05 am
DEN
- PHL
Nonstop3h 44m
Frontier
Deal found 6/22![Frontier logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 9/24:45 pm
PHL
- DEN
1 stop7h 25m
Frontier
Wed 9/1611:59 pm
DEN
- PHL
1 stop11h 13m
Frontier
Deal found 6/22![Frontier logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/251:32 pm
PHL
- DEN
1 stop10h 56m
Frontier
Sat 8/19:58 am
DEN
- PHL
1 stop7h 22m
Frontier
Deal found 6/23![Frontier logo]()
$243
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 8/214:45 pm
PHL
- DEN
1 stop18h 34m
Frontier
Sun 9/611:59 pm
DEN
- PHL
Nonstop3h 40m
Frontier
Deal found 6/23![Frontier logo]()
$244
This CheapOair deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/411:06 am
PHL
- DEN
1 stop8h 54m
Multiple Airlines
Wed 8/1211:37 pm
DEN
- PHL
1 stop6h 45m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/244:40 pm
PHL
- DEN
1 stop18h 23m
Frontier
Tue 8/49:58 am
DEN
- PHL
1 stop10h 30m
Frontier
Deal found 6/25![Frontier logo]()
$246
This Super.com deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1512:44 pm
PHL
- DEN
Nonstop4h 14m
Frontier
Tue 7/216:05 am
DEN
- PHL
Nonstop3h 44m
Frontier
Deal found 6/24![Frontier logo]()
$248
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 8/284:45 pm
PHL
- DEN
1 stop18h 34m
Frontier
Wed 9/211:59 pm
DEN
- PHL
Nonstop3h 40m
Frontier
Deal found 6/23![Frontier logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 8/174:40 pm
PHL
- DEN
1 stop18h 39m
Multiple Airlines
Sun 8/239:00 am
DEN
- PHL
1 stop28h 45m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$251
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Tue 8/48:20 am
PHL
- EGE
1 stop7h 12m
American Airlines
Wed 8/1210:28 am
EGE
- PHL
1 stop6h 20m
American Airlines
Deal found 6/24![American Airlines logo]()
$311
This American Airlines deal was found by Cheapflights users on 6/24. 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 9/127:00 am
PHL
- MTJ
1 stop8h 26m
American Airlines
Mon 9/142:21 pm
MTJ
- PHL
1 stop8h 01m
American Airlines
Deal found 6/24![American Airlines logo]()
$317
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 June 27, 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 June 27, 2026.
This Delta deal was found by Cheapflights users on 6/24. 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 9/89:35 am
PHL
- COS
2 stops12h 21m
Delta
Tue 9/156:00 am
COS
- PHL
1 stop6h 45m
Delta
Deal found 6/24![Delta logo]()
$338
This American Airlines deal was found by Cheapflights users on 6/24. 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 7/295:30 pm
PHL
- GJT
1 stop8h 46m
American Airlines
Sun 8/26:54 pm
GJT
- PHL
1 stop8h 41m
American Airlines
Deal found 6/24![American Airlines logo]()
$360
This Southwest deal was found by Cheapflights users on 6/26. 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 8/228:05 am
PHL
- COS
1 stop5h 35m
Southwest
Mon 8/246:00 am
COS
- PHL
2 stops9h 25m
Southwest
Deal found 6/26![Southwest logo]()
$369
This United Airlines deal was found by Cheapflights users on 6/25. 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 8/316:16 am
PHL
- ASE
1 stop7h 13m
United Airlines
Fri 9/42:15 pm
ASE
- PHL
1 stop7h 29m
United Airlines
Deal found 6/25![United Airlines logo]()
$385
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 7/214:30 pm
PHL
- ALS
2 stops23h 00m
Multiple Airlines
Fri 7/242:00 pm
ALS
- PHL
1 stop19h 49m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$578
This Southwest deal was found by Cheapflights users on 6/27. 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 8/88:55 am
PHL
- DEN
1 stop9h 30m
Southwest
Sat 11/217:30 pm
DEN
- PHL
Nonstop3h 20m
Southwest
Deal found 6/27![Southwest logo]()
$371
This Delta deal was found by Cheapflights users on 6/23. 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 9/23:58 pm
PHL
- COS
1 stop7h 40m
Delta
Fri 9/46:16 pm
COS
- PHL
1 stop9h 49m
Delta
Deal found 6/23![Delta logo]()
$377
This United Airlines deal was found by Cheapflights users on 6/23. 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 8/116:25 am
PHL
- ASE
1 stop6h 41m
United Airlines
Wed 8/192:15 pm
ASE
- PHL
2 stops8h 44m
United Airlines
Deal found 6/23![United Airlines logo]()
$390
This Delta deal was found by Cheapflights users on 6/27. 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.
Sat 8/85:46 am
PHL
- COS
1 stop7h 01m
Delta
Wed 8/126:16 pm
COS
- PHL
2 stops13h 22m
Delta
Deal found 6/27![Delta logo]()
$381
This United Airlines deal was found by Cheapflights users on 6/22. 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 7/214:14 pm
PHL
- DEN
Nonstop4h 11m
United Airlines
Mon 7/2711:59 pm
DEN
- PHL
Nonstop3h 32m
United Airlines
Deal found 6/22![United Airlines logo]()
$391
This Southwest deal was found by Cheapflights users on 6/24. 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 8/262:45 pm
PHL
- COS
2 stops9h 00m
Southwest
Sun 8/306:05 am
COS
- PHL
2 stops9h 35m
Southwest
Deal found 6/24![Southwest logo]()
$396
This American Airlines deal was found by Cheapflights users on 6/23. 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.
Tue 7/285:30 pm
PHL
- DRO
1 stop8h 32m
American Airlines
Wed 8/512:40 pm
DRO
- PHL
1 stop8h 11m
American Airlines
Deal found 6/23![American Airlines logo]()
$437
This Delta deal was found by Cheapflights users on 6/25. 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 9/153:45 pm
PHL
- COS
2 stops8h 39m
Delta
Fri 9/186:00 am
COS
- PHL
1 stop6h 45m
Delta
Deal found 6/25![Delta logo]()
$382
This Southwest deal was found by Cheapflights users on 6/25. 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 9/151:45 pm
PHL
- COS
2 stops10h 00m
Southwest
Fri 9/186:30 am
COS
- PHL
2 stops9h 25m
Southwest
Deal found 6/25![Southwest logo]()
$401
This United Airlines deal was found by Cheapflights users on 6/24. 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 8/248:00 am
PHL
- EGE
1 stop8h 27m
United Airlines
Wed 8/261:30 pm
EGE
- PHL
2 stops9h 29m
United Airlines
Deal found 6/24![United Airlines logo]()
$407
This Delta deal was found by Cheapflights users on 6/27. 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 8/2611:39 am
PHL
- GJT
2 stops8h 39m
Delta
Wed 9/27:41 am
GJT
- PHL
1 stop8h 06m
Delta
Deal found 6/27![Delta logo]()
$390
This Southwest deal was found by Cheapflights users on 6/25. 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 8/3111:45 am
PHL
- MTJ
2 stops9h 35m
Southwest
Fri 9/49:10 am
MTJ
- PHL
2 stops10h 50m
Southwest
Deal found 6/25![Southwest logo]()
$402
This American Airlines deal was found by Cheapflights users on 6/23. 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.
Fri 9/1110:20 pm
PHL
- MTJ
2 stops13h 21m
American Airlines
Mon 9/142:21 pm
MTJ
- PHL
1 stop8h 01m
American Airlines
Deal found 6/23![American Airlines logo]()
$488
This United Airlines deal was found by Cheapflights users on 6/25. 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 8/296:25 am
PHL
- MTJ
1 stop7h 23m
United Airlines
Wed 9/23:24 pm
MTJ
- PHL
1 stop6h 20m
United Airlines
Deal found 6/25![United Airlines logo]()
$409
This Delta deal was found by Cheapflights users on 6/26. 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 8/105:16 pm
PHL
- DEN
1 stop6h 49m
Delta
Sun 8/2312:50 am
DEN
- PHL
1 stop6h 48m
Delta
Deal found 6/26![Delta logo]()
$405
This United Airlines deal was found by Cheapflights users on 6/23. 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 9/263:52 pm
PHL
- GJT
1 stop6h 38m
United Airlines
Sat 10/39:24 am
GJT
- PHL
1 stop8h 09m
United Airlines
Deal found 6/23![United Airlines logo]()
$413
This Southwest deal was found by Cheapflights users on 6/22. 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 7/2112:45 pm
PHL
- DEN
1 stop7h 25m
Southwest
Mon 7/277:10 am
DEN
- PHL
2 stops8h 40m
Southwest
Deal found 6/22![Southwest logo]()
$416
This United Airlines deal was found by Cheapflights users on 6/24. 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 12/810:15 am
PHL
- HDN
2 stops12h 14m
United Airlines
Wed 12/91:29 pm
HDN
- PHL
1 stop7h 17m
United Airlines
Deal found 6/24![United Airlines logo]()
$414
This Southwest deal was found by Cheapflights users on 6/25. 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 9/245:55 am
PHL
- DEN
2 stops9h 50m
Southwest
Mon 9/288:05 am
DEN
- PHL
2 stops7h 50m
Southwest
Deal found 6/25![Southwest logo]()
$435
This Delta deal was found by Cheapflights users on 6/24. 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 10/75:30 am
PHL
- ASE
1 stop8h 05m
Delta
Wed 10/148:05 am
ASE
- PHL
1 stop8h 14m
Delta
Deal found 6/24![Delta logo]()
$457
This United Airlines deal was found by Cheapflights users on 6/25. 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 8/2910:34 am
PHL
- HDN
2 stops11h 50m
United Airlines
Wed 9/21:30 pm
HDN
- PHL
2 stops9h 29m
United Airlines
Deal found 6/25![United Airlines logo]()
$419
This American Airlines deal was found by Cheapflights users on 6/25. 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 7/85:00 am
PHL
- EGE
1 stop6h 53m
American Airlines
Wed 7/82:12 pm
EGE
- PHL
1 stop8h 23m
American Airlines
Deal found 6/25![American Airlines logo]()
$628
This Southwest deal was found by Cheapflights users on 6/26. 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 7/287:25 am
PHL
- DEN
2 stops9h 15m
Southwest
Sun 8/21:50 pm
DEN
- PHL
2 stops8h 25m
Southwest
Deal found 6/26![Southwest logo]()
$444
This United Airlines deal was found by Cheapflights users on 6/27. 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 12/211:39 am
PHL
- DRO
2 stops11h 01m
United Airlines
Sun 12/61:15 pm
DRO
- PHL
1 stop7h 31m
United Airlines
Deal found 6/27![United Airlines logo]()
$435
This Southwest deal was found by Cheapflights users on 6/22. 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 7/291:50 pm
PHL
- DEN
2 stops8h 10m
Southwest
Mon 8/37:20 am
DEN
- PHL
2 stops8h 30m
Southwest
Deal found 6/22![Southwest logo]()
$447
Last-minute flights from Philadelphia to ColoradoDiscover last-minute flight deals from Philadelphia to Colorado. Data last updated June 27, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Colorado. Data last updated June 27, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 6/23. 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.
Fri 7/38:37 pm
PHL
- DEN
Nonstop4h 22m
Frontier
Tue 7/76:05 am
DEN
- PHL
Nonstop3h 44m
Frontier
Deal found 6/23![Frontier logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/134:40 pm
PHL
- DEN
1 stop18h 23m
Frontier
Wed 7/159:58 am
DEN
- PHL
1 stop10h 30m
Frontier
Deal found 6/23![Frontier logo]()
$252
This Super.com deal was found by Cheapflights users on 6/24. 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
Sat 7/186:05 am
DEN
- PHL
Nonstop3h 44m
Frontier
Deal found 6/24![Frontier logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/144:30 pm
PHL
- DEN
1 stop18h 33m
Frontier
Tue 7/216:30 am
DEN
- PHL
1 stop13h 58m
Frontier
Deal found 6/24![Frontier logo]()
$251
This Super.com deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1512:44 pm
PHL
- DEN
Nonstop4h 14m
Frontier
Tue 7/216:05 am
DEN
- PHL
Nonstop3h 44m
Frontier
Deal found 6/24![Frontier logo]()
$248
This American Airlines deal was found by Cheapflights users on 6/27. 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.
Tue 7/218:20 am
PHL
- COS
1 stop8h 23m
American Airlines
Wed 7/221:07 pm
COS
- PHL
1 stop7h 10m
American Airlines
Deal found 6/27![American Airlines logo]()
$351
This American Airlines deal was found by Cheapflights users on 6/23. 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.
Tue 7/215:38 pm
PHL
- GJT
1 stop7h 13m
American Airlines
Tue 7/286:54 pm
GJT
- PHL
1 stop8h 41m
American Airlines
Deal found 6/23![American Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/244:40 pm
PHL
- DEN
1 stop18h 23m
Frontier
Tue 8/49:58 am
DEN
- PHL
1 stop10h 30m
Frontier
Deal found 6/25![Frontier logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 7/251:32 pm
PHL
- DEN
1 stop10h 56m
Frontier
Sat 8/19:58 am
DEN
- PHL
1 stop7h 22m
Frontier
Deal found 6/23![Frontier logo]()
$243
This American Airlines deal was found by Cheapflights users on 6/24. 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 7/255:00 am
PHL
- COS
1 stop6h 52m
American Airlines
Wed 7/293:46 pm
COS
- PHL
1 stop6h 49m
American Airlines
Deal found 6/24![American Airlines logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 7/274:40 pm
PHL
- DEN
1 stop18h 23m
Frontier
Wed 8/510:00 am
DEN
- PHL
1 stop19h 15m
Frontier
Deal found 6/25![Frontier logo]()
$256
This American Airlines deal was found by Cheapflights users on 6/27. 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 7/304:17 pm
PHL
- GJT
1 stop9h 59m
American Airlines
Sun 8/26:54 pm
GJT
- PHL
1 stop9h 45m
American Airlines
Deal found 6/27![American Airlines logo]()
$369
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 June 27, 2026.
Search for one-way flight options from Philadelphia to Colorado. Find affordable one-way fares based on user searches. Data last updated June 27, 2026.
This Frontier deal was found by Cheapflights users on 6/26. 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 8/278:37 pm
PHL
- DEN
Nonstop4h 27m
Frontier
Deal found 6/26![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 8/236:07 pm
PHL
- DEN
1 stop23h 16m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 9/206:10 pm
PHL
- DEN
1 stop23h 46m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 8/165:36 pm
PHL
- DEN
2 stops39h 58m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 7/237:43 pm
PHL
- DEN
1 stop21h 40m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$142
This Cheapflightsfares deal was found by Cheapflights users on 6/24. 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 8/184:45 pm
PHL
- DEN
1 stop7h 20m
Frontier
Deal found 6/24![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 9/36:10 pm
PHL
- DEN
1 stop23h 13m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 9/185:28 pm
PHL
- DEN
1 stop18h 03m
Frontier
Deal found 6/23![Frontier logo]()
$145
This Cheapflightsfares deal was found by Cheapflights users on 6/24. 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.
Mon 8/178:37 pm
PHL
- DEN
Nonstop4h 27m
Frontier
Deal found 6/24![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 7/296:30 am
PHL
- DEN
2 stops11h 24m
Frontier
Deal found 6/24![Frontier logo]()
$147
This Frontier deal was found by Cheapflights users on 6/24. 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.
Mon 8/248:37 pm
PHL
- DEN
Nonstop4h 27m
Frontier
Deal found 6/24![Frontier logo]()
$148
This Frontier deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2112:44 pm
PHL
- DEN
Nonstop4h 14m
Frontier
Deal found 6/25![Frontier logo]()
$149
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 June 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $240 (Kiwi.com) |
One-way from | $138 (Frontier) |
Popular in | June |
Cheapest in | August |
Average price | $465 |
Good round-trip deal | $348 or less |
Good one-way deal | $194 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 June 27, 2026.
Use the filters below to find and compare flights from Philadelphia to Colorado that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaColorado Springs
PHL - COS
PHLCOS
Philadelphia
Tue 9/8
9:35 am-7:56 pm
2 stops12h 21m
Colorado Springs
Tue 9/15
6:00 am-2:45 pm
1 stop6h 45m
$338
PhiladelphiaGrand Junction
PHL - GJT
PHLGJT
Philadelphia
Wed 7/29
5:30 pm-12:16 am
1 stop8h 46m
Grand Junction Regnl
Sun 8/2
6:54 pm-5:35 am
1 stop8h 41m
$360
PhiladelphiaColorado Springs
PHL - COS
PHLCOS
Philadelphia
Sat 8/22
8:05 am-11:40 am
1 stop5h 35m
Colorado Springs
Mon 8/24
6:00 am-5:25 pm
2 stops9h 25m
$369
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Sat 8/8
8:55 am-4:25 pm
1 stop9h 30m
Denver Intl
Sat 11/21
7:30 pm-12:50 am
Nonstop3h 20m
$371
PhiladelphiaColorado Springs
PHL - COS
PHLCOS
Philadelphia
Wed 9/2
3:58 pm-9:38 pm
1 stop7h 40m
Colorado Springs
Fri 9/4
6:16 pm-6:05 am
1 stop9h 49m
$377
PhiladelphiaColorado Springs
PHL - COS
PHLCOS
Philadelphia
Sat 8/8
5:46 am-10:47 am
1 stop7h 01m
Colorado Springs
Wed 8/12
6:16 pm-9:38 am
2 stops13h 22m
$381
PhiladelphiaColorado Springs
PHL - COS
PHLCOS
Philadelphia
Tue 9/15
3:45 pm-10:24 pm
2 stops8h 39m
Colorado Springs
Fri 9/18
6:00 am-2:45 pm
1 stop6h 45m
$382
PhiladelphiaAspen
PHL - ASE
PHLASE
Philadelphia
Mon 8/31
6:16 am-11:29 am
1 stop7h 13m
Aspen Pitkin County
Fri 9/4
2:15 pm-11:44 pm
1 stop7h 29m
$385
PhiladelphiaAspen
PHL - ASE
PHLASE
Philadelphia
Tue 8/11
6:25 am-11:06 am
1 stop6h 41m
Aspen Pitkin County
Wed 8/19
2:15 pm-12:59 am
2 stops8h 44m
$390
PhiladelphiaGrand Junction
PHL - GJT
PHLGJT
Philadelphia
Wed 8/26
11:39 am-6:18 pm
2 stops8h 39m
Grand Junction Regnl
Wed 9/2
7:41 am-5:47 pm
1 stop8h 06m
$390
Showing 1-10 of 60 resultsSorted by cheapest first
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-COS
PHL-GJT
PHL-EGE
PHL-MTJ
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-COS
PHL-GJT
PHL-EGE
What is the cheapest month to book a flight from Philadelphia to Colorado?
Currently, December is the cheapest month in which you can book a flight from Philadelphia to Colorado (average of $77). Flying from Philadelphia to Colorado in January is currently the most expensive (average of $598). 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 June 27, 2026.
It’s optimal to fly from Philadelphia to Colorado in the evening. By choosing this option you can save up to 36% on the cost of your flight, compared to a flight in the afternoon.
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 June 27, 2026.
The most flights from PHL to USCO are scheduled on a Friday (18 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (10 on average).
How much does it cost to fly round-trip from Philadelphia to Colorado?
How far ahead should I book a flight from Philadelphia to Colorado?
To ensure you get the cheapest price possible for a flight from Philadelphia to Colorado, you should look to book at least 32 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 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 June 20, 2026.
Travelers seeking maximum savings on their Philadelphia to Colorado flight should consider departing on Tuesday evenings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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 June 27, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited Airlines from Philadelphia to Colorado to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
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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Alternative routes for Philadelphia to Colorado
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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.
Search flights from Philadelphia to Colorado by cabin class
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 June 27, 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 6 airlines flying from Philadelphia to Colorado
Discover the top 6 airlines that operate flights from Philadelphia to Colorado. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$239 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$187 | Average$471 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$475 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$217 | Average$469 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$220 | Average$306 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$237 | Average$507 | FlexibilityNo cancel fee | On-timeN/A |