$119+ 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
Sep 14 — Sep 211
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Colorado with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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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 Philadelphia to Colorado
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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 August 15, 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 August 15, 2026.
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 9/48:37 pm -
Nonstop4h 27m
Sat 9/511:00 am -
1 stop9h 47m
Deal found 8/14![Frontier logo]()
$227
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.
Wed 9/28:37 pm -
Nonstop4h 27m
Sat 9/511:59 pm -
Nonstop3h 40m
Deal found 8/14![Frontier logo]()
$228
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:00 am -
1 stop12h 01m
Fri 10/167:37 pm -
Nonstop3h 39m
Deal found 8/14![Frontier logo]()
$229
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 8/318:37 pm -
Nonstop4h 27m
Tue 9/811:59 pm -
1 stop16h 15m
Deal found 8/12![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.
Mon 9/2812:40 pm -
1 stop10h 44m
Sat 10/107:37 pm -
Nonstop3h 39m
Deal found 8/14![Frontier logo]()
$231
This CheapOair deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/41:00 pm -
1 stop12h 00m
Mon 9/710:49 pm -
1 stop23h 06m
Deal found 8/11![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/284:45 pm -
1 stop7h 25m
Mon 8/3111:59 pm -
1 stop10h 27m
Deal found 8/10![Frontier logo]()
$233
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/43:00 pm -
1 stop10h 00m
Thu 9/178:55 pm -
1 stop11h 54m
Deal found 8/14![Frontier logo]()
$234
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:50 am -
Nonstop4h 10m
Mon 10/127:37 pm -
Nonstop3h 39m
Deal found 8/15![Frontier logo]()
$235
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 9/610:22 am -
1 stop8h 23m
Thu 9/108:00 am -
1 stop7h 20m
Deal found 8/12![Multiple Airlines logo]()
$236
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:43 am -
1 stop9h 13m
Wed 10/2112:46 pm -
1 stop8h 06m
Deal found 8/11![American Airlines logo]()
$237
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 12/124:00 pm -
1 stop9h 24m
Tue 1/57:05 am -
1 stop8h 35m
Deal found 8/12![Delta logo]()
$237
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 August 15, 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 August 15, 2026.
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.
Sat 9/122:30 pm -
1 stop7h 26m
Sat 9/196:00 am -
1 stop8h 13m
Deal found 8/13![Delta logo]()
$268
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:05 pm -
2 stops8h 45m
Fri 10/22:05 pm -
1 stop5h 45m
Deal found 8/10![Southwest logo]()
$297
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.
Fri 9/113:48 pm -
Nonstop4h 07m
Mon 9/1411:59 pm -
1 stop7h 44m
Deal found 8/12![United Airlines logo]()
$306
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:00 am -
1 stop6h 58m
Tue 11/311:59 am -
1 stop7h 04m
Deal found 8/10![American Airlines logo]()
$348
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.
Thu 8/278:37 pm -
1 stop16h 58m
Mon 8/314:25 pm -
2 stops36h 50m
Deal found 8/12![Multiple Airlines logo]()
$595
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 9/23:58 pm -
1 stop7h 40m
Fri 9/46:16 pm -
1 stop9h 49m
Deal found 8/12![Delta logo]()
$299
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/53:48 pm -
Nonstop4h 07m
Wed 9/96:01 pm -
Nonstop3h 43m
Deal found 8/10![United Airlines logo]()
$317
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.
Mon 9/285:25 am -
Nonstop3h 50m
Mon 10/57:30 pm -
Nonstop3h 30m
Deal found 8/14![Southwest logo]()
$321
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 9/239:35 am -
2 stops12h 21m
Mon 9/286:11 pm -
1 stop9h 54m
Deal found 8/12![Delta logo]()
$304
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2910:05 am -
Nonstop4h 05m
Sat 10/105:37 pm -
Nonstop3h 43m
Deal found 8/14![United Airlines logo]()
$321
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:00 am -
Nonstop3h 55m
Sun 9/276:35 pm -
Nonstop3h 40m
Deal found 8/13![Southwest logo]()
$324
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 10/145:00 am -
1 stop7h 31m
Tue 10/201:09 pm -
1 stop9h 16m
Deal found 8/14![American Airlines logo]()
$404
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 10/243:52 pm -
1 stop6h 47m
Tue 10/271:40 pm -
1 stop7h 59m
Deal found 8/12![United Airlines logo]()
$337
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 9/77:20 am -
1 stop9h 42m
Mon 9/143:58 pm -
1 stop5h 58m
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.
Fri 11/135:00 am -
Nonstop4h 15m
Wed 11/186:30 am -
1 stop5h 30m
Deal found 8/14![Southwest logo]()
$343
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/297:45 am -
1 stop6h 48m
Tue 11/31:35 pm -
1 stop8h 04m
Deal found 8/14![United Airlines logo]()
$348
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.
Tue 9/223:54 pm -
1 stop6h 02m
Sat 9/266:00 am -
1 stop6h 44m
Deal found 8/14![Delta logo]()
$351
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:20 am -
2 stops6h 35m
Sat 10/311:30 am -
2 stops7h 25m
Deal found 8/13![Southwest logo]()
$354
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.
Tue 9/152:30 pm -
1 stop7h 26m
Mon 9/216:11 pm -
1 stop9h 54m
Deal found 8/14![Delta logo]()
$351
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/119:45 am -
2 stops9h 22m
Mon 11/161:35 pm -
1 stop8h 04m
Deal found 8/11![United Airlines logo]()
$354
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:20 am -
2 stops6h 40m
Wed 9/238:35 am -
2 stops7h 25m
Deal found 8/11![Southwest logo]()
$354
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:35 am -
2 stops9h 53m
Sat 10/316:00 am -
2 stops9h 47m
Deal found 8/10![American Airlines logo]()
$499
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.
Sat 10/246:00 am -
1 stop8h 21m
Wed 10/286:07 pm -
2 stops13h 22m
Deal found 8/14![Delta logo]()
$356
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.
Sat 9/196:25 am -
2 stops10h 02m
Fri 9/253:23 pm -
1 stop5h 57m
Deal found 8/13![United Airlines logo]()
$356
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/145:20 am -
Nonstop4h 15m
Sun 1/177:30 am -
1 stop6h 55m
Deal found 8/11![Southwest logo]()
$361
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.
Sat 8/2911:00 am -
1 stop9h 42m
Wed 9/27:50 am -
1 stop8h 58m
Deal found 8/14![American Airlines logo]()
$502
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:00 am -
1 stop8h 34m
Tue 10/271:32 pm -
1 stop8h 07m
Deal found 8/14![United Airlines logo]()
$359
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.
Fri 9/112:30 pm -
1 stop7h 26m
Mon 9/146:11 pm -
2 stops13h 16m
Deal found 8/12![Delta logo]()
$360
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 10/305:55 am -
2 stops8h 40m
Sun 11/18:10 am -
2 stops8h 35m
Deal found 8/12![Southwest logo]()
$377
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.
Tue 9/153:48 pm -
1 stop6h 47m
Sat 9/191:40 pm -
1 stop8h 04m
Deal found 8/12![United Airlines logo]()
$359
Last-minute flights from Philadelphia to ColoradoDiscover last-minute flight deals from Philadelphia to Colorado. Data last updated August 15, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Colorado. Data last updated August 15, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/284:45 pm -
1 stop7h 25m
Mon 8/3111:59 pm -
1 stop10h 27m
Deal found 8/10![Frontier logo]()
$233
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 8/318:37 pm -
Nonstop4h 27m
Tue 9/811:59 pm -
1 stop16h 15m
Deal found 8/12![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.
Wed 9/28:00 am -
1 stop29h 19m
Tue 9/810:49 pm -
1 stop23h 06m
Deal found 8/14![Frontier logo]()
$228
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 9/48:37 pm -
Nonstop4h 27m
Sat 9/511:00 am -
1 stop9h 47m
Deal found 8/14![Frontier logo]()
$227
This CheapOair deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/41:00 pm -
1 stop12h 00m
Mon 9/710:49 pm -
1 stop23h 06m
Deal found 8/11![Frontier logo]()
$232
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/43:00 pm -
1 stop10h 00m
Thu 9/178:55 pm -
1 stop11h 54m
Deal found 8/14![Frontier logo]()
$234
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:37 pm -
Nonstop4h 27m
Mon 9/711:59 pm -
Nonstop3h 40m
Deal found 8/12![Frontier logo]()
$235
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 9/610:22 am -
1 stop8h 23m
Thu 9/108:00 am -
1 stop7h 20m
Deal found 8/12![Multiple Airlines logo]()
$236
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.
Sun 9/68:37 pm -
Nonstop4h 27m
Thu 9/101:39 pm -
1 stop24h 07m
Deal found 8/13![Frontier logo]()
$237
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.
Sat 9/122:32 pm -
1 stop8h 08m
Sat 9/195:01 am -
1 stop7h 53m
Deal found 8/13![American Airlines logo]()
$237
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:00 am -
1 stop12h 01m
Fri 10/167:37 pm -
Nonstop3h 39m
Deal found 8/14![Frontier logo]()
$229
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.
Mon 9/2812:40 pm -
1 stop10h 44m
Sat 10/107:37 pm -
Nonstop3h 39m
Deal found 8/14![Frontier logo]()
$231
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 August 15, 2026.
Search for one-way flight options from Philadelphia to Colorado. Find affordable one-way fares based on user searches. Data last updated August 15, 2026.
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:00 am -
1 stop5h 50m
Deal found 8/10![Southwest logo]()
$119
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 10/316:00 am -
2 stops13h 32m
Deal found 8/12![Delta logo]()
$124
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:37 pm -
Nonstop4h 27m
Deal found 8/15![Frontier logo]()
$131
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:05 pm -
Nonstop3h 50m
Deal found 8/13![Southwest 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.
Thu 9/34:45 pm -
1 stop7h 20m
Deal found 8/12![Frontier logo]()
$133
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/41:51 pm -
1 stop21h 18m
Deal found 8/14![Frontier logo]()
$134
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:35 pm -
Nonstop4h 11m
Deal found 8/11![American Airlines logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:30 am -
2 stops16h 25m
Deal found 8/11![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.
Thu 11/123:22 pm -
2 stops20h 08m
Deal found 8/12![Frontier logo]()
$141
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:37 pm -
Nonstop4h 27m
Deal found 8/13![Frontier logo]()
$143
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.
Mon 9/147:19 pm -
2 stops14h 56m
Deal found 8/13![Frontier logo]()
$145
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 9/95:00 am -
1 stop6h 22m
Deal found 8/14![American Airlines logo]()
$176
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 August 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $227 (Cheapflightsfares) |
One-way from | $119 (Southwest) |
Popular in | June |
Cheapest in | January |
Average price | $377 |
Good round-trip deal | $324 or less |
Good one-way deal | $188 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 August 15, 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 Philadelphia - COS Colorado Springs
PHLCOS
Philadelphia
Sat 9/12
2:30 pm-7:56 pm
1 stop7h 26m
Colorado Springs
Sat 9/19
6:00 am-4:13 pm
1 stop8h 13m
$268
PhiladelphiaColorado Springs
PHL Philadelphia - COS Colorado Springs
PHLCOS
Philadelphia
Wed 9/30
3:05 pm-9:50 pm
2 stops8h 45m
Colorado Springs
Fri 10/2
2:05 pm-9:50 pm
1 stop5h 45m
$297
PhiladelphiaColorado Springs
PHL Philadelphia - COS Colorado Springs
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
$299
PhiladelphiaColorado Springs
PHL Philadelphia - COS Colorado Springs
PHLCOS
Philadelphia
Wed 9/23
9:35 am-7:56 pm
2 stops12h 21m
Colorado Springs
Mon 9/28
6:11 pm-6:05 am
1 stop9h 54m
$304
PhiladelphiaDenver
PHL Philadelphia - DEN Denver Intl
PHLDEN
Philadelphia
Fri 9/11
3:48 pm-5:55 pm
Nonstop4h 07m
Denver Intl
Mon 9/14
11:59 pm-9:43 am
1 stop7h 44m
$306
PhiladelphiaDenver
PHL Philadelphia - DEN Denver Intl
PHLDEN
Philadelphia
Sat 9/5
3:48 pm-5:55 pm
Nonstop4h 07m
Denver Intl
Wed 9/9
6:01 pm-11:44 pm
Nonstop3h 43m
$317
Quickest round-trip
PhiladelphiaDenver
PHL Philadelphia - DEN Denver Intl
PHLDEN
Philadelphia
Mon 9/28
5:25 am-7:15 am
Nonstop3h 50m
Denver Intl
Mon 10/5
7:30 pm-1:00 am
Nonstop3h 30m
$321
PhiladelphiaDenver
PHL Philadelphia - DEN Denver Intl
PHLDEN
Philadelphia
Tue 9/29
10:05 am-12:10 pm
Nonstop4h 05m
Denver Intl
Sat 10/10
5:37 pm-11:20 pm
Nonstop3h 43m
$321
PhiladelphiaDenver
PHL Philadelphia - DEN Denver Intl
PHLDEN
Philadelphia
Wed 9/23
6:00 am-7:55 am
Nonstop3h 55m
Denver Intl
Sun 9/27
6:35 pm-12:15 am
Nonstop3h 40m
$324
PhiladelphiaMontrose
PHL Philadelphia - MTJ Montrose County
PHLMTJ
Philadelphia
Sat 10/24
3:52 pm-8:39 pm
1 stop6h 47m
Montrose County
Tue 10/27
1:40 pm-11:39 pm
1 stop7h 59m
$337
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-HDN
PHL-GJT
PHL-EGE
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-HDN
PHL-GJT
What is the cheapest month to book a flight from Philadelphia to Colorado?
Currently, April is the cheapest month in which you can book a flight from Philadelphia to Colorado (average of $338). Flying from Philadelphia to Colorado in June is currently the most expensive (average of $482). 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 August 15, 2026.
It’s optimal to fly from Philadelphia to Colorado in the evening. By choosing this option you can save up to 38% 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 August 15, 2026.
The most flights from PHL to USCO are scheduled on a Friday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).
How much does it cost to fly round-trip from Philadelphia to Colorado?
Airfare is below average for this route at the moment.
Philadelphia to Colorado flights typically cost between $285 and $474 in September.The cheapest round-trip price found within the last 5 days was $227 on Frontier (Sep 4-Sep 5).
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 27 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 August 15, 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. Sunday 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 August 15, 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
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Colorado. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Complete your trip
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Philadelphia and Colorado flights
Browse other Philadelphia and Colorado flight options. Last updated on August 15, 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 August 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$94 | Average$256 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$187 | Average$481 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$198 | Average$480 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$220 | Average$473 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$220 | Average$332 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$236 | Average$509 | FlexibilityNo cancel fee | On-timeN/A |