$157+ Cheap flights from Colorado to Philadelphia (PHL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Nov 1 — Nov 81
Round-trip
1 adult, Economy
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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
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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 October 2, 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 October 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/137:10 am -
2 stops32h 25m
Tue 12/154:38 pm -
1 stop29h 17m
Deal found 9/28![Frontier logo]()
$262
This Cheapflightsfares deal was found by Cheapflights users on 9/28. 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.
Thu 12/109:00 am -
1 stop6h 35m
Sun 12/136:40 pm -
1 stop13h 49m
Deal found 9/28![Frontier logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Fri 12/119:00 am -
1 stop12h 05m
Sun 12/136:40 pm -
2 stops29h 15m
Deal found 9/27![Frontier logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/269:12 pm -
2 stops19h 07m
Mon 11/25:22 pm -
1 stop17h 00m
Deal found 9/28![Frontier logo]()
$265
This Mytrip deal was found by Cheapflights users on 9/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1310:41 am -
2 stops18h 40m
Tue 11/175:22 pm -
2 stops24h 31m
Deal found 9/27![Frontier logo]()
$266
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/59:19 pm -
2 stops32h 02m
Mon 11/95:22 pm -
1 stop17h 00m
Deal found 9/28![Frontier logo]()
$269
This Mytrip deal was found by Cheapflights users on 9/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1810:43 am -
2 stops20h 42m
Thu 11/266:41 am -
1 stop17h 19m
Deal found 9/29![Frontier logo]()
$270
This Frontier deal was found by Cheapflights users on 9/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:10 am -
2 stops13h 55m
Tue 12/88:34 am -
2 stops15h 21m
Deal found 9/29![Frontier logo]()
$271
This Kissandfly.com deal was found by Cheapflights users on 9/27. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:37 pm -
Nonstop3h 39m
Sat 10/248:30 am -
1 stop15h 01m
Deal found 9/27![Frontier logo]()
$272
This Cheapflightsfares deal was found by Cheapflights users on 9/29. 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.
Sat 10/177:37 pm -
Nonstop3h 39m
Sun 10/255:50 am -
Nonstop4h 10m
Deal found 9/29![Frontier logo]()
$273
This CheapOair deal was found by Cheapflights users on 9/29. 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 10/256:57 pm -
1 stop26h 14m
Sat 10/316:00 am -
1 stop17h 42m
Deal found 9/29![Frontier logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 9/29. 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.
Fri 10/167:37 pm -
Nonstop3h 39m
Wed 10/2112:35 pm -
2 stops25h 22m
Deal found 9/29![Frontier logo]()
$275
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 October 2, 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 October 2, 2026.
This United Airlines deal was found by Cheapflights users on 9/28. 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.
Mon 11/26:08 pm -
Nonstop3h 31m
Wed 11/43:35 pm -
Nonstop4h 20m
Deal found 9/28![United Airlines logo]()
$321
This Southwest deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/271:30 pm -
2 stops6h 20m
Thu 10/295:10 pm -
2 stops10h 30m
Deal found 10/2![Southwest logo]()
$351
This Delta deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 stop6h 41m
Tue 11/176:30 am -
1 stop7h 56m
Deal found 10/1![Delta logo]()
$351
This American Airlines deal was found by Cheapflights users on 9/30. 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.
Sat 1/2312:00 pm -
1 stop8h 59m
Mon 1/255:00 am -
1 stop9h 26m
Deal found 9/30![American Airlines logo]()
$368
This United Airlines deal was found by Cheapflights users on 9/29. 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.
Thu 1/149:35 am -
1 stop6h 03m
Mon 1/183:30 pm -
Nonstop3h 58m
Deal found 9/29![United Airlines logo]()
$327
This Delta deal was found by Cheapflights users on 9/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/26:05 pm -
2 stops13h 24m
Mon 12/76:20 am -
1 stop8h 13m
Deal found 9/30![Delta logo]()
$356
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 10/306:08 pm -
Nonstop3h 31m
Mon 11/210:00 am -
Nonstop4h 20m
Deal found 10/1![United Airlines logo]()
$331
This Delta deal was found by Cheapflights users on 9/29. 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.
Thu 10/226:07 pm -
1 stop9h 58m
Tue 10/276:10 am -
2 stops8h 20m
Deal found 9/29![Delta logo]()
$356
This United Airlines deal was found by Cheapflights users on 9/28. 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.
Fri 11/62:00 pm -
Nonstop3h 31m
Sat 11/73:25 pm -
Nonstop4h 20m
Deal found 9/28![United Airlines logo]()
$331
This KAYAK deal was found by Cheapflights users on 9/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:40 am -
1 stop12h 45m
Sat 11/76:40 am -
2 stops13h 55m
Deal found 9/30![Southwest logo]()
$404
This American Airlines deal was found by Cheapflights users on 9/30. 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.
Sun 12/206:48 pm -
1 stop8h 23m
Thu 12/2412:35 pm -
1 stop7h 50m
Deal found 9/30![American Airlines logo]()
$414
This Delta deal was found by Cheapflights users on 9/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:07 pm -
2 stops13h 22m
Mon 11/212:32 pm -
2 stops9h 44m
Deal found 9/28![Delta logo]()
$361
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 12/1510:55 am -
2 stops9h 10m
Sat 12/194:15 pm -
2 stops17h 50m
Deal found 10/1![Southwest logo]()
$411
This United Airlines deal was found by Cheapflights users on 9/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/258:00 am -
1 stop7h 37m
Sun 2/288:10 am -
1 stop7h 56m
Deal found 9/30![United Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 9/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/58:02 am -
2 stops13h 25m
Mon 12/712:22 pm -
2 stops12h 02m
Deal found 9/30![Delta logo]()
$361
This American Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 10/157:18 pm -
1 stop9h 23m
Sat 10/2412:50 pm -
1 stop10h 31m
Deal found 10/2![American Airlines logo]()
$448
This Southwest deal was found by Cheapflights users on 9/29. 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 11/77:00 am -
2 stops11h 20m
Sat 11/1411:30 am -
2 stops8h 50m
Deal found 9/29![Southwest logo]()
$411
This United Airlines deal was found by Cheapflights users on 9/28. 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.
Fri 11/612:02 pm -
1 stop7h 36m
Mon 11/96:15 am -
1 stop7h 00m
Deal found 9/28![United Airlines logo]()
$370
This Delta deal was found by Cheapflights users on 9/29. 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.
Tue 11/31:31 pm -
1 stop8h 18m
Fri 11/138:00 am -
1 stop6h 26m
Deal found 9/29![Delta logo]()
$370
This American Airlines deal was found by Cheapflights users on 9/30. 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 2/2512:04 pm -
2 stops9h 55m
Sun 2/287:00 am -
1 stop10h 33m
Deal found 9/30![American Airlines logo]()
$463
This Southwest deal was found by Cheapflights users on 9/29. 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.
Wed 12/1612:25 pm -
2 stops7h 40m
Tue 12/297:40 am -
2 stops7h 35m
Deal found 9/29![Southwest logo]()
$440
This United Airlines deal was found by Cheapflights users on 9/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/232:45 pm -
1 stop6h 01m
Mon 1/251:16 pm -
2 stops9h 24m
Deal found 9/30![United Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 9/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:02 am -
2 stops12h 11m
Fri 12/115:15 am -
1 stop9h 18m
Deal found 9/30![Delta logo]()
$410
This United Airlines deal was found by Cheapflights users on 9/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:47 pm -
1 stop7h 52m
Tue 11/173:05 pm -
2 stops8h 54m
Deal found 9/30![United Airlines logo]()
$384
This Southwest deal was found by Cheapflights users on 9/27. 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.
Fri 10/168:35 am -
2 stops9h 00m
Tue 10/276:25 am -
2 stops14h 45m
Deal found 9/27![Southwest logo]()
$478
This Delta deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 10/276:00 am -
1 stop6h 51m
Fri 11/208:00 am -
1 stop6h 26m
Deal found 10/1![Delta logo]()
$411
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 12/117:00 am -
2 stops8h 57m
Sun 12/137:41 am -
1 stop6h 53m
Deal found 10/1![United Airlines logo]()
$391
This Delta deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 10/241:26 pm -
1 stop6h 14m
Fri 11/203:40 pm -
1 stop7h 10m
Deal found 10/1![Delta logo]()
$411
This American Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 10/1512:48 pm -
1 stop9h 24m
Fri 10/163:07 pm -
1 stop7h 14m
Deal found 10/1![American Airlines logo]()
$625
This United Airlines deal was found by Cheapflights users on 9/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/81:35 pm -
1 stop7h 11m
Mon 1/1111:17 am -
2 stops10h 52m
Deal found 9/30![United Airlines logo]()
$398
Last-minute flights from Colorado to PhiladelphiaDiscover last-minute flight deals from Colorado to Philadelphia. Data last updated October 2, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Philadelphia. Data last updated October 2, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/29. 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.
Fri 10/167:37 pm -
Nonstop3h 39m
Wed 10/2112:35 pm -
2 stops25h 22m
Deal found 9/29![Frontier logo]()
$275
This Super.com deal was found by Cheapflights users on 9/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:37 pm -
Nonstop3h 39m
Mon 10/195:50 am -
Nonstop4h 10m
Deal found 9/27![Frontier logo]()
$271
This Kissandfly.com deal was found by Cheapflights users on 9/27. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:37 pm -
Nonstop3h 39m
Sat 10/248:30 am -
1 stop15h 01m
Deal found 9/27![Frontier logo]()
$272
This Cheapflightsfares deal was found by Cheapflights users on 9/29. 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.
Sat 10/177:37 pm -
Nonstop3h 39m
Sun 10/255:50 am -
Nonstop4h 10m
Deal found 9/29![Frontier logo]()
$273
This FlightHub deal was found by Cheapflights users on 9/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:57 pm -
1 stop10h 24m
Sun 10/255:50 am -
Nonstop4h 10m
Deal found 9/27![Frontier logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Thu 10/227:37 pm -
Nonstop3h 39m
Sun 10/256:00 am -
2 stops52h 22m
Deal found 9/27![Frontier logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Thu 10/2211:21 am -
2 stops10h 22m
Mon 10/2612:35 pm -
1 stop21h 47m
Deal found 9/27![Frontier logo]()
$263
This CheapOair deal was found by Cheapflights users on 9/29. 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 10/256:57 pm -
1 stop26h 14m
Sat 10/316:00 am -
1 stop17h 42m
Deal found 9/29![Frontier logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/59:19 pm -
2 stops32h 02m
Mon 11/95:22 pm -
1 stop17h 00m
Deal found 9/28![Frontier logo]()
$269
This Mytrip deal was found by Cheapflights users on 9/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1310:41 am -
2 stops18h 40m
Tue 11/175:22 pm -
2 stops24h 31m
Deal found 9/27![Frontier logo]()
$266
This Mytrip deal was found by Cheapflights users on 9/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1810:43 am -
2 stops20h 42m
Thu 11/266:41 am -
1 stop17h 19m
Deal found 9/29![Frontier logo]()
$270
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/193:00 pm -
1 stop6h 24m
Fri 11/279:41 pm -
1 stop14h 02m
Deal found 9/28![Frontier logo]()
$276
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 October 2, 2026.
Search for one-way flight options from Colorado to Philadelphia. Find affordable one-way fares based on user searches. Data last updated October 2, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/30. 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.
Wed 10/146:12 pm -
Nonstop3h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$157
This Super.com deal was found by Cheapflights users on 9/30. 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.
Wed 12/2311:55 pm -
1 stop9h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$158
This Cheapflightsfares deal was found by Cheapflights users on 9/30. 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 12/227:04 pm -
1 stop7h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$159
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 11/96:45 pm -
Nonstop3h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Southwest logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 9/29. 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.
Thu 10/299:12 pm -
2 stops32h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 11/17:09 pm -
1 stop19h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Frontier logo]()
$163
This Super.com deal was found by Cheapflights users on 9/30. 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 10/157:37 pm -
Nonstop3h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:37 pm -
Nonstop3h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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 12/298:00 am -
Nonstop3h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Frontier logo]()
$167
This Super.com deal was found by Cheapflights users on 9/30. 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.
Tue 10/207:37 pm -
Nonstop3h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 9/30. 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.
Tue 12/299:10 pm -
2 stops23h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Multiple Airlines logo]()
$169
This Super.com deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” 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.
Sat 10/107:37 pm -
Nonstop3h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Frontier logo]()
$170
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 October 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $262 (Kiwi.com) |
One-way from | $157 (Cheapflightsfares) |
Popular in | June |
Cheapest in | February |
Average price | $373 |
Good round-trip deal | $358 or less |
Good one-way deal | $216 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 7,457,451 searches. Data last updated October 2, 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
Mon 12/7
6:00 pm-11:25 pm
Nonstop3h 25m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$161
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Sat 11/14
6:08 pm-11:39 pm
Nonstop3h 31m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$161
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Sat 10/31
2:30 pm-8:00 pm
Nonstop3h 30m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$161
Quickest round-trip
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Mon 11/2
6:45 pm-12:05 am
Nonstop3h 20m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$161
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Sat 12/5
11:45 am-5:10 pm
Nonstop3h 25m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$161
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Wed 12/16
10:55 am-10:05 pm
2 stops9h 10m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$176
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Fri 11/27
6:00 am-4:40 pm
1 stop8h 40m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$181
VailPhiladelphia
EGE Vail Eagle County - PHL Philadelphia
EGEPHL
Vail Eagle County
Thu 12/31
1:30 pm-12:34 am
2 stops9h 04m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$186
MontrosePhiladelphia
MTJ Montrose County - PHL Philadelphia
MTJPHL
Montrose County
Mon 11/9
8:25 am-4:35 pm
1 stop6h 10m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$193
MontrosePhiladelphia
MTJ Montrose County - PHL Philadelphia
MTJPHL
Montrose County
Mon 11/9
1:40 pm-11:30 pm
2 stops7h 50m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$198
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
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
DEN-PHL
COS-PHL
DRO-PHL
HDN-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 October 2, 2026.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 37% 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 October 2, 2026.
The most flights from USCO to PHL are scheduled on a Thursday (20 on average). You will have fewer flight options on Tuesday, 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?
Airfare is below average for this route at the moment.
Colorado to Philadelphia flights typically cost between $269 and $469 in December.The cheapest round-trip price found within the last 5 days was $262 on Frontier (Dec 13-Dec 15).
How far ahead should I book a flight from Colorado to Philadelphia?
Booking 51 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 September 26, 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
Reading
King of Prussia
Camden
Ocean City
Cherry Hill
Wildwood Crest
Lewes
Plymouth Meeting
Wyomissing
Pottstown
Milford
Ephrata
Dover
Elkton
Essington
New Castle
Willow Grove
Vineland
Millville
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Alternative routes for Colorado to Philadelphia
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Complete your trip
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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 October 2, 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 October 2, 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 7,457,451 searches. Data last updated October 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$122 | Average$297 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$138 | Average$448 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$139 | Average$468 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$185 | Average$372 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$241 | Average$488 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$248 | Average$509 | FlexibilityNo cancel fee | On-time63% |