$100+ Cheap flights from Colorado to Philadelphia (PHL)
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 6/11. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Apr 30 — May 71
Round-trip
1 adult, Economy
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Find cheap flights from Colorado to Philadelphia with Cheapflights
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Cheapest flights from Colorado to PhiladelphiaExplore the most affordable flight options available from Colorado to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2026.
Explore the most affordable flight options available from Colorado to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/99:25 am
DEN
- PHL
1 stop8h 29m
Frontier
Mon 4/138:25 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 3/27![Frontier logo]()
$174
This Frontier deal was found by Cheapflights users on 3/26. 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.
Tue 4/711:59 pm
DEN
- PHL
1 stop13h 12m
Frontier
Mon 4/138:25 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 3/26![Frontier logo]()
$175
This CheapOair deal was found by Cheapflights users on 3/29. 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.
Sun 4/2610:29 pm
DEN
- PHL
1 stop30h 21m
Frontier
Sun 5/35:55 am
PHL
- DEN
1 stop29h 00m
Frontier
Deal found 3/29![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 3/26. 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.
Thu 4/911:49 pm
DEN
- PHL
1 stop8h 37m
Frontier
Sun 4/129:38 pm
PHL
- DEN
1 stop27h 30m
Frontier
Deal found 3/26![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 5/216:03 am
DEN
- PHL
1 stop8h 35m
Frontier
Sun 5/245:06 pm
PHL
- DEN
1 stop8h 46m
Frontier
Deal found 3/30![Frontier logo]()
$178
This Super.com deal was found by Cheapflights users on 3/30. 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.
Thu 4/3011:59 pm
DEN
- PHL
Nonstop3h 35m
Frontier
Mon 5/48:41 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 3/30![Frontier logo]()
$179
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 4/3011:59 pm
DEN
- PHL
Nonstop3h 35m
Frontier
Wed 5/68:35 pm
PHL
- DEN
Nonstop4h 29m
Frontier
Deal found 3/30![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 3/26. 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.
Sat 4/1811:59 pm
DEN
- PHL
Nonstop3h 36m
Frontier
Thu 4/238:41 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 3/26![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/257:05 pm
DEN
- PHL
1 stop8h 08m
Frontier
Sun 4/266:54 pm
PHL
- DEN
1 stop7h 05m
Frontier
Deal found 3/30![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 5/1511:59 pm
DEN
- PHL
Nonstop3h 38m
Frontier
Sat 5/168:35 pm
PHL
- DEN
Nonstop4h 29m
Frontier
Deal found 3/30![Frontier logo]()
$183
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 6/411:54 pm
DEN
- PHL
1 stop10h 31m
Frontier
Sun 6/77:50 pm
PHL
- DEN
1 stop16h 14m
Frontier
Deal found 3/30![Frontier logo]()
$184
This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/811:59 pm
DEN
- PHL
Nonstop3h 38m
Frontier
Fri 6/1212:42 pm
PHL
- DEN
Nonstop4h 14m
Frontier
Deal found 3/27![Frontier logo]()
$185
Best flights from Colorado to PhiladelphiaDiscover carefully curated flight deals from Colorado to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 31, 2026.
Discover carefully curated flight deals from Colorado to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 31, 2026.
This Delta deal was found by Cheapflights users on 3/27. 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.
Tue 5/191:55 pm
COS
- PHL
1 stop6h 17m
Delta
Tue 6/22:23 pm
PHL
- COS
1 stop9h 04m
Delta
Deal found 3/27![Delta logo]()
$241
This Southwest deal was found by Cheapflights users on 3/29. 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 5/910:15 am
DEN
- PHL
2 stops9h 20m
Southwest
Mon 5/114:30 pm
PHL
- DEN
2 stops8h 30m
Southwest
Deal found 3/29![Southwest logo]()
$251
This United Airlines deal was found by Cheapflights users on 3/28. 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 5/51:25 pm
COS
- PHL
1 stop8h 18m
United Airlines
Wed 5/66:10 am
PHL
- COS
1 stop6h 37m
United Airlines
Deal found 3/28![United Airlines logo]()
$341
This American Airlines deal was found by Cheapflights users on 3/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/112:41 pm
DRO
- PHL
1 stop8h 06m
American Airlines
Sat 5/910:55 am
PHL
- DRO
1 stop7h 39m
American Airlines
Deal found 3/26![American Airlines logo]()
$358
This Southwest deal was found by Cheapflights users on 3/27. 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.
Wed 5/66:50 am
DEN
- PHL
2 stops8h 00m
Southwest
Wed 5/132:00 pm
PHL
- DEN
2 stops8h 40m
Southwest
Deal found 3/27![Southwest logo]()
$251
This Delta deal was found by Cheapflights users on 3/25. 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.
Wed 4/151:14 pm
COS
- PHL
1 stop7h 36m
Delta
Wed 4/223:42 pm
PHL
- COS
1 stop6h 38m
Delta
Deal found 3/25![Delta logo]()
$253
This Southwest deal was found by Cheapflights users on 3/29. 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 5/910:15 am
DEN
- PHL
2 stops9h 20m
Southwest
Tue 5/1211:35 am
PHL
- DEN
2 stops7h 45m
Southwest
Deal found 3/29![Southwest logo]()
$251
This United Airlines deal was found by Cheapflights users on 3/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/291:40 pm
HDN
- PHL
2 stops9h 19m
United Airlines
Sat 5/23:34 pm
PHL
- HDN
1 stop6h 43m
United Airlines
Deal found 3/26![United Airlines logo]()
$345
This Southwest deal was found by Cheapflights users on 3/29. 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 5/88:00 am
DEN
- PHL
2 stops7h 15m
Southwest
Mon 5/114:30 pm
PHL
- DEN
2 stops8h 30m
Southwest
Deal found 3/29![Southwest logo]()
$289
This American Airlines deal was found by Cheapflights users on 3/27. 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 9/111:53 am
DRO
- PHL
1 stop6h 55m
American Airlines
Tue 9/83:08 pm
PHL
- DRO
1 stop6h 52m
American Airlines
Deal found 3/27![American Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 3/28. 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 6/25:54 pm
DEN
- PHL
Nonstop3h 36m
United Airlines
Fri 6/124:14 pm
PHL
- DEN
Nonstop4h 11m
United Airlines
Deal found 3/28![United Airlines logo]()
$345
This American Airlines deal was found by Cheapflights users on 3/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1712:41 pm
DRO
- PHL
1 stop8h 06m
American Airlines
Mon 4/203:58 pm
PHL
- DRO
1 stop7h 45m
American Airlines
Deal found 3/26![American Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 3/25. 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.
Tue 5/53:25 pm
COS
- PHL
1 stop6h 18m
United Airlines
Sat 5/99:55 am
PHL
- COS
1 stop8h 36m
United Airlines
Deal found 3/25![United Airlines logo]()
$353
This Delta deal was found by Cheapflights users on 3/26. 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.
Tue 4/1412:55 am
DEN
- PHL
1 stop6h 30m
Delta
Wed 4/153:42 pm
PHL
- DEN
1 stop6h 37m
Delta
Deal found 3/26![Delta logo]()
$397
This Southwest deal was found by Cheapflights users on 3/29. 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 4/258:15 am
DEN
- PHL
2 stops8h 20m
Southwest
Mon 4/272:15 pm
PHL
- DEN
2 stops7h 05m
Southwest
Deal found 3/29![Southwest logo]()
$341
This United Airlines deal was found by Cheapflights users on 3/25. 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.
Wed 5/136:57 pm
COS
- PHL
2 stops12h 57m
United Airlines
Tue 6/26:00 am
PHL
- COS
1 stop7h 10m
United Airlines
Deal found 3/25![United Airlines logo]()
$358
This American Airlines deal was found by Cheapflights users on 3/27. 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 4/166:55 pm
GJT
- PHL
1 stop10h 05m
American Airlines
Tue 4/211:47 pm
PHL
- GJT
2 stops10h 06m
American Airlines
Deal found 3/27![American Airlines logo]()
$394
This Delta deal was found by Cheapflights users on 3/27. 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.
Thu 4/161:33 pm
ASE
- PHL
1 stop7h 17m
Delta
Sun 4/195:30 am
PHL
- ASE
1 stop8h 08m
Delta
Deal found 3/27![Delta logo]()
$414
This United Airlines deal was found by Cheapflights users on 3/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/33:23 pm
MTJ
- PHL
1 stop6h 14m
United Airlines
Sun 9/1310:00 am
PHL
- MTJ
1 stop6h 27m
United Airlines
Deal found 3/26![United Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 3/30. 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 4/161:07 pm
ASE
- PHL
2 stops9h 33m
American Airlines
Sun 4/195:00 am
PHL
- ASE
1 stop9h 28m
American Airlines
Deal found 3/30![American Airlines logo]()
$424
This Southwest deal was found by Cheapflights users on 3/26. 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 5/1610:15 am
DEN
- PHL
2 stops9h 20m
Southwest
Tue 5/1911:35 am
PHL
- DEN
2 stops7h 45m
Southwest
Deal found 3/26![Southwest logo]()
$387
This Delta deal was found by Cheapflights users on 3/29. 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 6/38:05 am
ASE
- PHL
1 stop8h 34m
Delta
Wed 6/106:25 am
PHL
- ASE
1 stop6h 58m
Delta
Deal found 3/29![Delta logo]()
$434
This United Airlines deal was found by Cheapflights users on 3/25. 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.
Wed 4/151:33 pm
COS
- PHL
2 stops9h 26m
United Airlines
Wed 4/2211:36 am
PHL
- COS
2 stops11h 10m
United Airlines
Deal found 3/25![United Airlines logo]()
$364
This Southwest deal was found by Cheapflights users on 3/26. 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.
Fri 5/16:45 am
COS
- PHL
2 stops9h 40m
Southwest
Wed 5/611:35 am
PHL
- COS
2 stops10h 40m
Southwest
Deal found 3/26![Southwest logo]()
$391
This American Airlines deal was found by Cheapflights users on 3/31. 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 4/1012:37 pm
MTJ
- PHL
1 stop8h 10m
American Airlines
Mon 5/1110:05 pm
PHL
- MTJ
2 stops15h 57m
American Airlines
Deal found 3/31![American Airlines logo]()
$457
This United Airlines deal was found by Cheapflights users on 3/28. 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 4/153:23 pm
DRO
- PHL
1 stop6h 20m
United Airlines
Tue 4/218:00 am
PHL
- DRO
1 stop6h 34m
United Airlines
Deal found 3/28![United Airlines logo]()
$383
This Southwest deal was found by Cheapflights users on 3/27. 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.
Mon 5/45:00 am
COS
- PHL
2 stops8h 50m
Southwest
Thu 5/72:15 pm
PHL
- COS
2 stops10h 00m
Southwest
Deal found 3/27![Southwest logo]()
$415
This United Airlines deal was found by Cheapflights users on 3/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/21:40 pm
MTJ
- PHL
2 stops9h 10m
United Airlines
Mon 9/143:55 pm
PHL
- MTJ
1 stop6h 17m
United Airlines
Deal found 3/26![United Airlines logo]()
$389
This Southwest deal was found by Cheapflights users on 3/26. 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.
Wed 9/29:05 am
MTJ
- PHL
2 stops6h 55m
Southwest
Mon 9/1410:20 am
PHL
- MTJ
2 stops11h 00m
Southwest
Deal found 3/26![Southwest logo]()
$420
This United Airlines deal was found by Cheapflights users on 3/29. 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 9/21:40 pm
MTJ
- PHL
2 stops9h 10m
United Airlines
Mon 9/710:28 am
PHL
- MTJ
2 stops11h 44m
United Airlines
Deal found 3/29![United Airlines logo]()
$419
Last-minute flights from Colorado to PhiladelphiaDiscover last-minute flight deals from Colorado to Philadelphia. Data last updated March 31, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Philadelphia. Data last updated March 31, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 3/26. 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.
Tue 4/711:59 pm
DEN
- PHL
1 stop13h 12m
Frontier
Mon 4/138:25 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 3/26![Frontier logo]()
$175
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 4/711:59 pm
DEN
- PHL
1 stop8h 54m
Frontier
Fri 4/178:36 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 3/30![Frontier logo]()
$179
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/99:25 am
DEN
- PHL
1 stop8h 29m
Frontier
Mon 4/138:25 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 3/27![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 3/26. 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.
Thu 4/911:49 pm
DEN
- PHL
1 stop8h 37m
Frontier
Sun 4/129:38 pm
PHL
- DEN
1 stop27h 30m
Frontier
Deal found 3/26![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 3/26. 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.
Sat 4/1112:30 pm
DEN
- PHL
1 stop8h 05m
Frontier
Sat 4/188:41 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 3/26![Frontier logo]()
$184
This Frontier deal was found by Cheapflights users on 3/26. 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.
Sat 4/119:00 pm
DEN
- PHL
1 stop10h 14m
Frontier
Fri 4/174:42 pm
PHL
- DEN
1 stop8h 17m
Frontier
Deal found 3/26![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 3/26. 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 4/1411:59 pm
DEN
- PHL
1 stop7h 12m
Frontier
Sun 4/198:36 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 3/26![Frontier logo]()
$178
This Frontier deal was found by Cheapflights users on 3/26. 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 4/161:09 pm
DEN
- PHL
1 stop9h 45m
Frontier
Sat 4/184:26 pm
PHL
- DEN
1 stop8h 33m
Frontier
Deal found 3/26![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 3/26. 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.
Sat 4/1811:59 pm
DEN
- PHL
Nonstop3h 36m
Frontier
Thu 4/238:41 pm
PHL
- DEN
Nonstop4h 28m
Frontier
Deal found 3/26![Frontier logo]()
$181
This Cheapflightsfares deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2411:59 pm
DEN
- PHL
Nonstop3h 35m
Frontier
Sun 4/263:29 pm
PHL
- DEN
1 stop18h 59m
Frontier
Deal found 3/29![Frontier logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/257:05 pm
DEN
- PHL
1 stop8h 08m
Frontier
Sun 4/266:54 pm
PHL
- DEN
1 stop7h 05m
Frontier
Deal found 3/30![Frontier logo]()
$182
This CheapOair deal was found by Cheapflights users on 3/29. 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.
Sun 4/2610:29 pm
DEN
- PHL
1 stop30h 21m
Frontier
Sun 5/35:55 am
PHL
- DEN
1 stop29h 00m
Frontier
Deal found 3/29![Frontier logo]()
$176
One-way flights from Colorado to PhiladelphiaSearch for one-way flight options from Colorado to Philadelphia. Find affordable one-way fares based on user searches. Data last updated March 31, 2026.
Search for one-way flight options from Colorado to Philadelphia. Find affordable one-way fares based on user searches. Data last updated March 31, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 3/29. 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 6/1111:49 pm
DEN
- PHL
1 stop9h 47m
Frontier
Deal found 3/29![Frontier logo]()
$100
This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2411:59 pm
DEN
- PHL
Nonstop3h 35m
Frontier
Deal found 3/27![Frontier logo]()
$102
This Super.com deal was found by Cheapflights users on 3/30. 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 5/226:03 am
DEN
- PHL
1 stop10h 37m
Frontier
Deal found 3/30![Frontier logo]()
$104
This Cheapflightsfares deal was found by Cheapflights users on 3/28. 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.
Sat 6/1311:42 pm
DEN
- PHL
1 stop10h 41m
Frontier
Deal found 3/28![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/59:52 am
DEN
- PHL
2 stops12h 52m
Frontier
Deal found 3/29![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:59 pm
DEN
- PHL
Nonstop3h 38m
Frontier
Deal found 3/27![Frontier logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 5/69:52 am
DEN
- PHL
2 stops12h 52m
Frontier
Deal found 3/30![Frontier logo]()
$110
This American Airlines deal was found by Cheapflights users on 3/30. 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 6/1011:59 pm
DEN
- PHL
Nonstop3h 36m
American Airlines
Deal found 3/30![American Airlines logo]()
$111
This CheapOair deal was found by Cheapflights users on 3/29. 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.
Thu 5/217:15 am
DEN
- PHL
1 stop29h 42m
Frontier
Deal found 3/29![Frontier logo]()
$112
This Delta deal was found by Cheapflights users on 3/27. 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 4/227:59 am
COS
- PHL
1 stop7h 43m
Delta
Deal found 3/27![Delta logo]()
$121
This United Airlines deal was found by Cheapflights users on 3/25. 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 5/161:25 pm
COS
- PHL
2 stops9h 34m
United Airlines
Deal found 3/25![United Airlines logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 5/36:46 pm
COS
- PHL
2 stops26h 53m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$136
Find flight deals from Colorado to Philadelphia
Keep the following information in mind while searching for Colorado to Philadelphia flight deals. Data was last updated March 31, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $174 (Cheapflightsfares) |
One-way from | $100 (Cheapflightsfares) |
Popular in | November |
Cheapest in | February |
Average price | $317 |
Good round-trip deal | $281 or less |
Good one-way deal | $210 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Colorado to Philadelphia 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 March 31, 2026.
Use the filters below to find and compare flights from Colorado to Philadelphia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Colorado SpringsPhiladelphia
COS - PHL
COSPHL
Colorado Springs
Tue 5/19
1:55 pm-10:12 pm
1 stop6h 17m
Philadelphia
Tue 6/2
2:23 pm-9:27 pm
1 stop9h 04m
$241
DenverPhiladelphia
DEN - PHL
DENPHL
Denver Intl
Sat 5/9
10:15 am-9:35 pm
2 stops9h 20m
Philadelphia
Mon 5/11
4:30 pm-11:00 pm
2 stops8h 30m
$251
DenverPhiladelphia
DEN - PHL
DENPHL
Denver Intl
Wed 5/6
6:50 am-4:50 pm
2 stops8h 00m
Philadelphia
Wed 5/13
2:00 pm-8:40 pm
2 stops8h 40m
$251
DenverPhiladelphia
DEN - PHL
DENPHL
Denver Intl
Sat 5/9
10:15 am-9:35 pm
2 stops9h 20m
Philadelphia
Tue 5/12
11:35 am-5:20 pm
2 stops7h 45m
$251
Colorado SpringsPhiladelphia
COS - PHL
COSPHL
Colorado Springs
Wed 4/15
1:14 pm-10:50 pm
1 stop7h 36m
Philadelphia
Wed 4/22
3:42 pm-8:20 pm
1 stop6h 38m
$253
DenverPhiladelphia
DEN - PHL
DENPHL
Denver Intl
Fri 5/8
8:00 am-5:15 pm
2 stops7h 15m
Philadelphia
Mon 5/11
4:30 pm-11:00 pm
2 stops8h 30m
$289
Colorado SpringsPhiladelphia
COS - PHL
COSPHL
Colorado Springs
Tue 5/5
1:25 pm-11:43 pm
1 stop8h 18m
Philadelphia
Wed 5/6
6:10 am-10:47 am
1 stop6h 37m
$341
DenverPhiladelphia
DEN - PHL
DENPHL
Denver Intl
Sat 4/25
8:15 am-6:35 pm
2 stops8h 20m
Philadelphia
Mon 4/27
2:15 pm-7:20 pm
2 stops7h 05m
$341
HaydenPhiladelphia
HDN - PHL
HDNPHL
Hayden Yampa Valley
Wed 4/29
1:40 pm-12:59 am
2 stops9h 19m
Philadelphia
Sat 5/2
3:34 pm-8:17 pm
1 stop6h 43m
$345
Quickest round-trip
DenverPhiladelphia
DEN - PHL
DENPHL
Denver Intl
Tue 6/2
5:54 pm-11:30 pm
Nonstop3h 36m
Philadelphia
Fri 6/12
4:14 pm-6:25 pm
Nonstop4h 11m
$345
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Colorado to Philadelphia
Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Colorado with our price prediction graph.
COS-PHL
DEN-PHL
DRO-PHL
HDN-PHL
GJT-PHL
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 Colorado to Philadelphia
USCO-PHL
COS-PHL
DEN-PHL
DRO-PHL
HDN-PHL
What is the cheapest month to book a flight from Colorado to Philadelphia?
Currently, October is the cheapest month in which you can book a flight from Colorado to Philadelphia (average of $65). Flying from Colorado to Philadelphia in July is currently the most expensive (average of $156). 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 CO to PHL?
Find hourly flight availability from Colorado to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 31, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 45% on flights from Colorado to Philadelphia by exploring options for tickets in the evening.
What is the cheapest day to fly from Colorado to Philadelphia?
Use this chart to determine the cheapest time to fly round-trip from Colorado to Philadelphia. Price data was last updated on March 28, 2026.
Travelers seeking maximum savings on their Colorado to Philadelphia flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Colorado to Philadelphia
Explore weekly flight availability from Colorado to Philadelphia. 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 March 31, 2026.
The most flights from USCO to PHL are scheduled on a Tuesday (11 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Colorado to Philadelphia?
Related info for your journey
Find useful and relevant information for your journey from Colorado to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Philadelphia?
Book flights to Philadelphia if you plan to visit one of these locationsWildwood
Reading
King of Prussia
Camden
Ocean City
Lewes
Dewey Beach
Pottstown
Ephrata
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Chester
Newark
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Alternative routes for Colorado to Philadelphia
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Complete your trip
Complete your trip to Philadelphia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Colorado to Philadelphia by cabin class
Find flights from Colorado to Philadelphia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Colorado and Philadelphia flights
Browse other Colorado and Philadelphia flight options. Last updated on March 31, 2026.
Other flights to Philadelphia
Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 31, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Colorado to Philadelphia flights
Consider these flights traveling from Colorado to Philadelphia.
Top 6 airlines flying from Colorado to Philadelphia
Discover the top 6 airlines that operate flights from Colorado to Philadelphia. 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 March 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$113 | Average$229 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$122 | Average$283 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$128 | Average$340 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$139 | Average$422 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$192 | Average$466 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$214 | Average$435 | FlexibilityNo cancel fee | On-time63% |