$131+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Sep 16 — Sep 231
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Colorado to Philadelphia with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Colorado to Philadelphia
Cheapest
Best
Last-minute
One-way
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 August 17, 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 August 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 10/87:37 pm -
Nonstop3h 39m
Mon 10/125:50 am -
Nonstop4h 10m
Deal found 8/15![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Fri 11/136:30 am -
1 stop23h 06m
Sun 11/155:28 pm -
1 stop22h 32m
Deal found 8/12![Frontier logo]()
$226
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 9/411:00 am -
1 stop10h 29m
Sun 9/68:37 pm -
Nonstop4h 27m
Deal found 8/14![Frontier logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/259:19 pm -
2 stops23h 59m
Mon 9/285:32 pm -
1 stop16h 32m
Deal found 8/13![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/111:59 pm -
Nonstop3h 40m
Sat 9/58:37 pm -
Nonstop4h 27m
Deal found 8/13![Frontier logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/109:19 pm -
2 stops31h 57m
Wed 9/1612:40 pm -
1 stop10h 23m
Deal found 8/16![Frontier logo]()
$230
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 9/411:59 pm -
Nonstop3h 40m
Mon 9/78:37 pm -
Nonstop4h 27m
Deal found 8/14![Frontier logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/237:37 pm -
Nonstop3h 39m
Mon 10/265:50 am -
Nonstop4h 10m
Deal found 8/14![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 8/156:05 am -
Nonstop3h 44m
Sun 8/306:07 pm -
1 stop23h 16m
Deal found 8/13![Multiple Airlines logo]()
$233
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 10/91:18 pm -
1 stop8h 09m
Tue 10/134:47 pm -
1 stop17h 31m
Deal found 8/14![Frontier logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 10/97:37 pm -
Nonstop3h 39m
Mon 10/125:50 am -
Nonstop4h 10m
Deal found 8/15![Frontier logo]()
$236
This American Airlines deal was found by Cheapflights users on 8/12. 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 9/195:01 am -
1 stop7h 53m
Sat 9/265:00 am -
1 stop6h 22m
Deal found 8/12![American Airlines logo]()
$237
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 August 17, 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 August 17, 2026.
This Southwest deal was found by Cheapflights users on 8/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:35 am -
2 stops7h 25m
Tue 9/151:45 pm -
2 stops8h 00m
Deal found 8/12![Southwest logo]()
$247
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Thu 9/1711:59 pm -
1 stop7h 44m
Mon 9/2110:05 am -
Nonstop4h 05m
Deal found 8/12![United Airlines logo]()
$281
This Delta deal was found by Cheapflights users on 8/12. 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 10/216:00 am -
1 stop6h 31m
Sat 10/246:10 am -
2 stops8h 11m
Deal found 8/12![Delta logo]()
$300
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Fri 9/1812:58 pm -
1 stop9h 24m
Mon 9/215:00 am -
1 stop9h 17m
Deal found 8/12![American Airlines logo]()
$341
This Delta deal was found by Cheapflights users on 8/12. 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.
Sat 9/511:27 am -
2 stops10h 15m
Wed 9/92:30 pm -
1 stop7h 26m
Deal found 8/12![Delta logo]()
$304
This United Airlines deal was found by Cheapflights users on 8/16. 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 11/42:00 pm -
Nonstop3h 31m
Wed 11/1110:00 am -
Nonstop4h 20m
Deal found 8/16![United Airlines logo]()
$321
This Southwest deal was found by Cheapflights users on 8/16. 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 11/412:25 pm -
2 stops6h 55m
Wed 11/111:25 pm -
2 stops10h 15m
Deal found 8/16![Southwest logo]()
$351
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/128:35 am -
1 stop7h 19m
Tue 9/153:48 pm -
Nonstop4h 07m
Deal found 8/16![United Airlines logo]()
$327
This Delta deal was found by Cheapflights users on 8/14. 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 10/266:00 am -
1 stop6h 31m
Mon 10/267:16 pm -
1 stop6h 28m
Deal found 8/14![Delta logo]()
$341
This Southwest deal was found by Cheapflights users on 8/14. 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 11/176:55 am -
1 stop7h 20m
Tue 1/57:30 am -
2 stops10h 05m
Deal found 8/14![Southwest logo]()
$356
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Fri 10/212:40 pm -
1 stop8h 41m
Wed 10/145:00 am -
1 stop6h 58m
Deal found 8/12![American Airlines logo]()
$400
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/116:01 pm -
Nonstop3h 43m
Wed 9/1610:05 am -
Nonstop4h 05m
Deal found 8/16![United Airlines logo]()
$332
This Southwest deal was found by Cheapflights users on 8/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/307:30 pm -
Nonstop3h 30m
Sun 11/16:00 am -
1 stop5h 50m
Deal found 8/12![Southwest logo]()
$357
This Delta deal was found by Cheapflights users on 8/15. 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 10/271:31 pm -
2 stops7h 37m
Sat 10/316:00 am -
2 stops13h 32m
Deal found 8/15![Delta logo]()
$361
This United Airlines deal was found by Cheapflights users on 8/12. 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 9/195:30 am -
2 stops10h 24m
Sat 9/266:10 am -
1 stop6h 45m
Deal found 8/12![United Airlines logo]()
$342
This American Airlines deal was found by Cheapflights users on 8/15. 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 9/122:21 pm -
1 stop8h 01m
Sun 9/135:00 am -
1 stop6h 41m
Deal found 8/15![American Airlines logo]()
$416
This Delta deal was found by Cheapflights users on 8/15. 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 9/216:11 pm -
1 stop9h 54m
Fri 9/253:54 pm -
1 stop6h 02m
Deal found 8/15![Delta logo]()
$368
This Southwest deal was found by Cheapflights users on 8/14. 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 9/116:00 pm -
Nonstop3h 50m
Sun 9/135:00 am -
Nonstop3h 50m
Deal found 8/14![Southwest logo]()
$388
This American Airlines deal was found by Cheapflights users on 8/14. 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 10/211:09 pm -
2 stops9h 08m
Wed 10/287:06 am -
1 stop7h 33m
Deal found 8/14![American Airlines logo]()
$429
This United Airlines deal was found by Cheapflights users on 8/13. 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 11/101:35 pm -
2 stops7h 56m
Wed 11/189:45 am -
2 stops9h 22m
Deal found 8/13![United Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 8/14. 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 11/257:20 pm -
1 stop7h 44m
Tue 12/15:22 pm -
1 stop7h 34m
Deal found 8/14![American Airlines logo]()
$437
This Delta deal was found by Cheapflights users on 8/16. 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 12/38:00 am -
2 stops13h 15m
Mon 12/78:00 am -
1 stop6h 58m
Deal found 8/16![Delta logo]()
$400
This Southwest deal was found by Cheapflights users on 8/14. 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 9/811:15 am -
2 stops7h 45m
Tue 9/1510:45 am -
1 stop7h 00m
Deal found 8/14![Southwest logo]()
$404
This United Airlines deal was found by Cheapflights users on 8/15. 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 9/2411:52 pm -
1 stop7h 51m
Sun 9/278:00 am -
Nonstop4h 02m
Deal found 8/15![United Airlines logo]()
$386
This American Airlines deal was found by Cheapflights users on 8/13. 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 9/1612:58 pm -
1 stop9h 24m
Mon 9/2112:55 pm -
1 stop7h 48m
Deal found 8/13![American Airlines logo]()
$438
This Southwest deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/111:50 am -
2 stops8h 15m
Tue 12/82:45 pm -
2 stops8h 55m
Deal found 8/16![Southwest logo]()
$405
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Wed 10/216:00 am -
2 stops9h 54m
Sat 10/2411:20 am -
2 stops9h 30m
Deal found 8/12![United Airlines logo]()
$393
This Delta deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:53 pm -
1 stop9h 12m
Tue 9/112:10 pm -
2 stops11h 46m
Deal found 8/13![Delta logo]()
$434
This Southwest deal was found by Cheapflights users on 8/16. 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 9/117:00 am -
2 stops7h 00m
Tue 9/1510:45 am -
2 stops8h 35m
Deal found 8/16![Southwest logo]()
$409
This American Airlines deal was found by Cheapflights users on 8/13. 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 9/1612:58 pm -
1 stop9h 24m
Tue 9/227:00 am -
1 stop7h 17m
Deal found 8/13![American Airlines logo]()
$451
Last-minute flights from Colorado to PhiladelphiaDiscover last-minute flight deals from Colorado to Philadelphia. Data last updated August 17, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Philadelphia. Data last updated August 17, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 8/156:05 am -
Nonstop3h 44m
Sun 8/306:07 pm -
1 stop23h 16m
Deal found 8/13![Multiple Airlines logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/111:59 pm -
Nonstop3h 40m
Sat 9/58:37 pm -
Nonstop4h 27m
Deal found 8/13![Frontier logo]()
$229
This Frontier deal was found by Cheapflights users on 8/13. 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.
Wed 9/211:59 pm -
Nonstop3h 40m
Thu 9/38:37 pm -
Nonstop4h 27m
Deal found 8/13![Frontier logo]()
$235
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 9/411:00 am -
1 stop10h 29m
Sun 9/68:37 pm -
Nonstop4h 27m
Deal found 8/14![Frontier logo]()
$227
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 9/411:59 pm -
Nonstop3h 40m
Mon 9/78:37 pm -
Nonstop4h 27m
Deal found 8/14![Frontier logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 9/511:00 am -
1 stop9h 47m
Wed 9/95:32 pm -
1 stop16h 32m
Deal found 8/14![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/109:19 pm -
2 stops31h 57m
Wed 9/1612:40 pm -
1 stop10h 23m
Deal found 8/16![Frontier logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 9/117:10 pm -
1 stop10h 06m
Thu 9/176:00 am -
1 stop7h 59m
Deal found 8/14![Frontier logo]()
$225
This CheapOair deal was found by Cheapflights users on 8/13. 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.
Fri 9/186:56 pm -
1 stop26h 59m
Mon 9/215:45 pm -
1 stop16h 07m
Deal found 8/13![Frontier logo]()
$232
This American Airlines deal was found by Cheapflights users on 8/12. 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 9/195:01 am -
1 stop7h 53m
Sat 9/265:00 am -
1 stop6h 22m
Deal found 8/12![American Airlines logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/249:16 pm -
2 stops32h 00m
Sun 9/278:41 am -
1 stop25h 23m
Deal found 8/13![Frontier logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/259:19 pm -
2 stops23h 59m
Mon 9/285:32 pm -
1 stop16h 32m
Deal found 8/13![Frontier logo]()
$228
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 August 17, 2026.
Search for one-way flight options from Colorado to Philadelphia. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/156:44 pm -
2 stops12h 48m
Deal found 8/14![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/19:16 pm -
2 stops32h 00m
Deal found 8/14![Frontier logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Mon 9/710:49 pm -
2 stops30h 27m
Deal found 8/12![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 11/1310:00 am -
2 stops19h 36m
Deal found 8/13![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 9/119:19 pm -
2 stops17h 08m
Deal found 8/15![Frontier logo]()
$135
This American Airlines deal was found by Cheapflights users on 8/13. 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 9/171:05 pm -
Nonstop3h 50m
Deal found 8/13![American Airlines logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 10/293:32 pm -
2 stops14h 04m
Deal found 8/13![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 10/99:19 pm -
2 stops31h 52m
Deal found 8/16![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Sun 9/610:09 am -
2 stops43h 06m
Deal found 8/12![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Sun 9/137:10 pm -
1 stop10h 06m
Deal found 8/12![Frontier logo]()
$140
This Super.com deal was found by Cheapflights users on 8/13. 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 8/1911:59 pm -
Nonstop3h 40m
Deal found 8/13![Frontier logo]()
$143
This Delta deal was found by Cheapflights users on 8/12. 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 9/146:11 pm -
1 stop9h 54m
Deal found 8/12![Delta logo]()
$146
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 August 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $225 (Kiwi.com) |
One-way from | $131 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $362 |
Good round-trip deal | $327 or less |
Good one-way deal | $188 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 August 17, 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
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Wed 9/9
6:35 am-4:00 pm
2 stops7h 25m
Philadelphia
Tue 9/15
1:45 pm-7:45 pm
2 stops8h 00m
$247
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Thu 9/17
11:59 pm-9:43 am
1 stop7h 44m
Philadelphia
Mon 9/21
10:05 am-12:10 pm
Nonstop4h 05m
$281
Colorado SpringsPhiladelphia
COS Colorado Springs - PHL Philadelphia
COSPHL
Colorado Springs
Wed 10/21
6:00 am-2:31 pm
1 stop6h 31m
Philadelphia
Sat 10/24
6:10 am-12:21 pm
2 stops8h 11m
$300
Colorado SpringsPhiladelphia
COS Colorado Springs - PHL Philadelphia
COSPHL
Colorado Springs
Sat 9/5
11:27 am-11:42 pm
2 stops10h 15m
Philadelphia
Wed 9/9
2:30 pm-7:56 pm
1 stop7h 26m
$304
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Wed 11/4
2:00 pm-7:31 pm
Nonstop3h 31m
Philadelphia
Wed 11/11
10:00 am-12:20 pm
Nonstop4h 20m
$321
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Sat 9/12
8:35 am-5:54 pm
1 stop7h 19m
Philadelphia
Tue 9/15
3:48 pm-5:55 pm
Nonstop4h 07m
$327
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Fri 9/11
6:01 pm-11:44 pm
Nonstop3h 43m
Philadelphia
Wed 9/16
10:05 am-12:10 pm
Nonstop4h 05m
$332
VailPhiladelphia
EGE Vail Eagle County - PHL Philadelphia
EGEPHL
Vail Eagle County
Fri 9/18
12:58 pm-12:22 am
1 stop9h 24m
Philadelphia
Mon 9/21
5:00 am-12:17 pm
1 stop9h 17m
$341
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Mon 10/26
6:00 am-2:31 pm
1 stop6h 31m
Philadelphia
Mon 10/26
7:16 pm-11:44 pm
1 stop6h 28m
$341
Colorado SpringsPhiladelphia
COS Colorado Springs - PHL Philadelphia
COSPHL
Colorado Springs
Sat 9/19
5:30 am-5:54 pm
2 stops10h 24m
Philadelphia
Sat 9/26
6:10 am-10:55 am
1 stop6h 45m
$342
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.
DEN-PHL
COS-PHL
HDN-PHL
EGE-PHL
MTJ-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
DEN-PHL
COS-PHL
HDN-PHL
EGE-PHL
What is the cheapest month to book a flight from Colorado to Philadelphia?
Currently, February is the cheapest month in which you can book a flight from Colorado to Philadelphia (average of $288). Flying from Colorado to Philadelphia in June is currently the most expensive (average of $472). 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 August 17, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 38% on flights from Colorado to Philadelphia by exploring options for tickets in the evening.
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 August 17, 2026.
The most flights from USCO to PHL are scheduled on a Friday (24 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (12 on average).
How much does it cost to fly round-trip from Colorado to Philadelphia?
Airfare is below average for this route at the moment.
Colorado to Philadelphia flights typically cost between $251 and $469 in October.The cheapest round-trip price found within the last 5 days was $225 on Frontier (Oct 8-Oct 12).
How far ahead should I book a flight from Colorado to Philadelphia?
Booking 79 days in advance of your planned departure date is, on average, the best time to get cheap flights from Colorado to Philadelphia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 August 15, 2026.
Travelers seeking maximum savings on their Colorado to Philadelphia flight should consider departing on Wednesday evenings 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.
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
King of Prussia
Reading
Camden
Wildwood Crest
Ocean City
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Pottstown
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Vineland
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Philadelphia flight routes
Popular flights
Top destinations
Alternative routes for Colorado to Philadelphia
See prices for flight routes from nearby airports that may be better suited for you.
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 August 17, 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 August 17, 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 August 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$118 | Average$286 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$122 | Average$290 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$128 | Average$362 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$139 | Average$455 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$207 | Average$459 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$236 | Average$500 | FlexibilityNo cancel fee | On-time63% |