$128+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Dec 9 — Dec 161
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
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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 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 November 9, 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 November 9, 2026.
This Frontier deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/99:00 am -
1 stop12h 11m
Sun 12/136:31 pm -
2 stops20h 04m
Deal found 11/8![Frontier logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/59:00 am -
1 stop7h 31m
Sat 12/126:31 pm -
1 stop13h 58m
Deal found 11/9![Frontier logo]()
$268
This Cheapflightsfares deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/119:00 am -
1 stop12h 11m
Tue 12/156:31 pm -
1 stop13h 58m
Deal found 11/9![Frontier logo]()
$270
This Mytrip deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 12/910:18 am -
2 stops10h 53m
Mon 12/148:40 am -
2 stops15h 15m
Deal found 11/5![Frontier logo]()
$271
This Kiwi.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 12/111:59 pm -
1 stop7h 56m
Sun 12/69:56 pm -
1 stop13h 53m
Deal found 11/6![Frontier logo]()
$272
This Cheapflightsfares deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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.
Sun 12/69:00 am -
1 stop12h 40m
Wed 12/98:40 am -
1 stop13h 17m
Deal found 11/6![Frontier logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/59:08 am -
1 stop8h 22m
Thu 12/106:31 pm -
2 stops20h 04m
Deal found 11/8![Frontier logo]()
$275
This CheapOair deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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.
Sat 12/59:00 am -
1 stop12h 11m
Tue 12/156:31 pm -
1 stop27h 26m
Deal found 11/7![Frontier logo]()
$276
This Delta deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 11/276:25 am -
1 stop9h 13m
Tue 12/17:11 pm -
1 stop6h 38m
Deal found 11/5![Delta logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/159:00 am -
1 stop6h 26m
Thu 1/77:16 am -
1 stop10h 12m
Deal found 11/8![Frontier logo]()
$278
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/55:30 pm -
Nonstop3h 20m
Wed 12/95:15 pm -
Nonstop4h 10m
Deal found 11/8![Southwest logo]()
$279
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 12/111:40 pm -
1 stop8h 01m
Mon 12/147:41 am -
1 stop6h 56m
Deal found 11/5![United Airlines logo]()
$351
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 November 9, 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 November 9, 2026.
This United Airlines deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/1210:15 am -
Nonstop3h 36m
Wed 12/169:55 am -
Nonstop4h 20m
Deal found 11/7![United Airlines logo]()
$279
This Cheapflightsfares deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” 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 11/2510:51 am -
1 stop12h 15m
Fri 11/279:55 pm -
1 stop13h 48m
Deal found 11/4![Frontier logo]()
$298
This Southwest deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/112:05 pm -
Nonstop3h 20m
Mon 12/145:00 am -
Nonstop4h 20m
Deal found 11/7![Southwest logo]()
$319
This Delta deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/236:33 pm -
1 stop9h 22m
Fri 1/19:10 am -
1 stop6h 42m
Deal found 11/8![Delta logo]()
$324
This American Airlines deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” 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 1/2112:09 pm -
Nonstop3h 36m
Sun 1/248:53 am -
Nonstop4h 31m
Deal found 11/4![American Airlines logo]()
$344
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 12/122:00 pm -
Nonstop3h 31m
Sat 12/197:35 am -
Nonstop4h 29m
Deal found 11/5![United Airlines logo]()
$335
This Southwest deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/318:10 am -
1 stop11h 20m
Fri 1/1511:15 am -
2 stops10h 25m
Deal found 11/7![Southwest logo]()
$350
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/152:00 pm -
Nonstop3h 31m
Tue 12/223:50 pm -
Nonstop4h 27m
Deal found 11/6![United Airlines logo]()
$360
This Southwest deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 1/711:10 am -
Nonstop3h 30m
Sun 1/105:15 pm -
Nonstop4h 15m
Deal found 11/9![Southwest logo]()
$405
This United Airlines deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/234:20 pm -
1 stop6h 14m
Thu 12/316:54 pm -
1 stop6h 26m
Deal found 11/7![United Airlines logo]()
$373
This United Airlines deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/214:20 pm -
1 stop6h 14m
Sat 1/27:37 pm -
1 stop6h 38m
Deal found 11/9![United Airlines logo]()
$381
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:05 am -
1 stop6h 46m
Fri 12/410:53 am -
2 stops11h 37m
Deal found 11/5![United Airlines logo]()
$382
This Delta deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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.
Sun 11/226:08 pm -
2 stops13h 19m
Tue 11/2411:45 am -
2 stops11h 05m
Deal found 11/8![Delta logo]()
$589
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/2411:50 am -
2 stops8h 20m
Thu 12/312:45 pm -
2 stops9h 15m
Deal found 11/8![Southwest logo]()
$489
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 2/128:02 am -
1 stop7h 33m
Tue 2/161:14 pm -
1 stop7h 10m
Deal found 11/6![United Airlines logo]()
$391
This Southwest deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/210:15 am -
2 stops9h 10m
Sun 12/65:00 am -
1 stop6h 25m
Deal found 11/9![Southwest logo]()
$509
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 12/1811:59 pm -
Nonstop3h 32m
Wed 12/233:50 pm -
Nonstop4h 27m
Deal found 11/5![United Airlines logo]()
$412
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/410:15 am -
2 stops9h 10m
Sun 12/131:50 pm -
2 stops12h 00m
Deal found 11/8![Southwest logo]()
$529
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 12/312:59 pm -
1 stop7h 57m
Mon 12/77:41 am -
1 stop8h 44m
Deal found 11/5![United Airlines logo]()
$446
This Southwest deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/36:55 am -
1 stop7h 20m
Thu 12/35:15 pm -
1 stop6h 30m
Deal found 11/9![Southwest logo]()
$583
This United Airlines deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/231:39 pm -
2 stops8h 55m
Fri 1/16:24 am -
2 stops10h 16m
Deal found 11/8![United Airlines logo]()
$453
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 12/512:10 pm -
1 stop8h 46m
Tue 12/83:35 pm -
1 stop7h 47m
Deal found 11/5![United Airlines logo]()
$471
This Southwest deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 12/1911:20 am -
1 stop11h 35m
Sat 1/25:15 pm -
1 stop7h 45m
Deal found 11/5![Southwest logo]()
$632
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 1/281:45 pm -
1 stop7h 52m
Mon 2/17:46 am -
1 stop6h 55m
Deal found 11/5![United Airlines logo]()
$497
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 1/2911:47 am -
1 stop9h 12m
Mon 2/11:19 pm -
1 stop7h 13m
Deal found 11/6![United Airlines logo]()
$511
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 1/291:10 pm -
1 stop7h 49m
Tue 2/23:27 pm -
1 stop7h 12m
Deal found 11/5![United Airlines logo]()
$514
This United Airlines deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 1/297:00 am -
1 stop6h 49m
Tue 2/23:27 pm -
1 stop7h 12m
Deal found 11/7![United Airlines logo]()
$529
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 1/137:00 am -
2 stops12h 40m
Mon 1/1810:31 am -
2 stops12h 08m
Deal found 11/6![United Airlines logo]()
$539
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 2/53:31 pm -
1 stop6h 06m
Tue 2/97:46 am -
1 stop7h 03m
Deal found 11/6![United Airlines logo]()
$545
This United Airlines deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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.
Sun 11/221:20 pm -
2 stops7h 49m
Tue 11/247:45 am -
1 stop6h 36m
Deal found 11/8![United Airlines logo]()
$583
Last-minute flights from Colorado to PhiladelphiaDiscover last-minute flight deals from Colorado to Philadelphia. Data last updated November 9, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Philadelphia. Data last updated November 9, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 11/276:25 am -
1 stop9h 13m
Tue 12/17:11 pm -
1 stop6h 38m
Deal found 11/5![Delta logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 12/111:59 pm -
1 stop7h 56m
Sun 12/69:56 pm -
1 stop13h 53m
Deal found 11/6![Frontier logo]()
$272
This Mytrip deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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.
Tue 12/18:46 pm -
2 stops19h 46m
Tue 12/82:51 pm -
2 stops26h 52m
Deal found 11/5![Frontier logo]()
$280
This Kiwi.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/59:00 am -
1 stop7h 31m
Sat 12/126:31 pm -
2 stops40h 19m
Deal found 11/8![Frontier logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/59:08 am -
1 stop8h 22m
Thu 12/106:31 pm -
2 stops20h 04m
Deal found 11/8![Frontier logo]()
$275
This CheapOair deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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.
Sat 12/59:00 am -
1 stop12h 11m
Tue 12/156:31 pm -
1 stop27h 26m
Deal found 11/7![Frontier logo]()
$276
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/55:30 pm -
Nonstop3h 20m
Wed 12/95:15 pm -
Nonstop4h 10m
Deal found 11/8![Southwest logo]()
$279
This Cheapflightsfares deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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.
Sun 12/69:00 am -
1 stop12h 40m
Wed 12/98:40 am -
1 stop13h 17m
Deal found 11/6![Frontier logo]()
$273
This Frontier deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/99:00 am -
1 stop12h 11m
Sun 12/136:31 pm -
2 stops20h 04m
Deal found 11/8![Frontier logo]()
$263
This Mytrip deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 12/910:18 am -
2 stops10h 53m
Mon 12/148:40 am -
2 stops15h 15m
Deal found 11/5![Frontier logo]()
$271
This Cheapflightsfares deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/119:00 am -
1 stop12h 11m
Tue 12/156:31 pm -
1 stop13h 58m
Deal found 11/9![Frontier logo]()
$270
This Kiwi.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/159:00 am -
1 stop6h 26m
Thu 1/77:16 am -
1 stop10h 12m
Deal found 11/8![Frontier logo]()
$278
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 November 9, 2026.
Search for one-way flight options from Colorado to Philadelphia. Find affordable one-way fares based on user searches. Data last updated November 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 12/68:40 pm -
2 stops24h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Frontier logo]()
$128
This American Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 12/112:45 pm -
Nonstop3h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![American Airlines logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/18:46 pm -
2 stops19h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Frontier logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 12/36:00 am -
2 stops15h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Frontier logo]()
$132
This Cheapflightsfares deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/227:08 pm -
1 stop8h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Frontier logo]()
$133
This Mytrip deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/1610:18 am -
2 stops10h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Frontier logo]()
$135
This Cheapflightsfares deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 11/266:20 am -
1 stop8h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Frontier logo]()
$136
This Southwest deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 12/316:00 pm -
Nonstop3h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Southwest logo]()
$137
This Super.com deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/199:23 pm -
1 stop13h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Frontier logo]()
$138
This United Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 11/279:35 am -
1 stop6h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![United Airlines logo]()
$139
This American Airlines deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/23:04 pm -
Nonstop3h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![American Airlines logo]()
$140
This Delta deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” 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 11/266:00 am -
1 stop6h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Delta logo]()
$176
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 November 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $263 (Frontier) |
One-way from | $128 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $437 |
Good round-trip deal | $369 or less |
Good one-way deal | $215 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 November 9, 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
Thu 12/17
11:59 pm-5:31 am
Nonstop3h 32m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$155
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Thu 12/10
11:55 pm-8:39 am
1 stop6h 44m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$155
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Thu 12/24
5:25 pm-10:59 pm
Nonstop3h 34m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$155
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Mon 12/14
7:05 am-2:15 pm
1 stop5h 10m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$165
Quickest round-trip
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Fri 12/4
6:10 pm-11:41 pm
Nonstop3h 31m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$165
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Fri 12/11
7:45 am-5:57 pm
1 stop8h 12m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$175
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Wed 12/2
10:15 am-3:51 pm
Nonstop3h 36m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$189
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Fri 11/27
10:10 am-3:46 pm
Nonstop3h 36m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$189
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Mon 12/21
6:00 am-4:44 pm
1 stop8h 44m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$190
HaydenPhiladelphia
HDN Hayden Yampa Valley - PHL Philadelphia
HDNPHL
Hayden Yampa Valley
Sat 1/23
12:32 pm-9:40 pm
1 stop7h 08m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$200
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
MTJ-PHL
EGE-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
MTJ-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 $470). 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 November 9, 2026.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 35% 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 November 9, 2026.
The most flights from USCO to PHL are scheduled on a Monday (13 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 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 $325 and $590 in December.The cheapest round-trip price found within the last 5 days was $263 on Frontier (Dec 9-Dec 13).
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 November 7, 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
Dover
Ocean City
Wildwood Crest
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Pottstown
Milford
Ephrata
Elkton
Essington
New Castle
Willow Grove
Glen Mills
Vineland
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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 November 9, 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 November 9, 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 November 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$125 | Average$299 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$139 | Average$468 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$164 | Average$463 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$185 | Average$390 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$248 | Average$500 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$249 | Average$511 | FlexibilityNo cancel fee | On-time63% |