$147+ Cheap flights from Denver to Philadelphia (DEN - 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — PHL
Oct 18 — Oct 251
Round-trip
1 adult, Economy
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Find cheap flights from Denver 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.Cheapflights Tip: The best prices from Denver Intl to Philadelphia are usually found in February or April, booked 41 days in advance, depart on a Thursday or Wednesday and return on a Saturday
Cheap flight deals from Denver to Philadelphia
Cheapest
Best
Last-minute
One-way
Cheapest flights from Denver to PhiladelphiaExplore the most affordable flight options available from Denver to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.
Explore the most affordable flight options available from Denver to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/13. 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.
Fri 11/2011:59 pm -
Nonstop3h 26m
Mon 11/238:38 pm -
Nonstop4h 26m
Deal found 9/13![Frontier logo]()
$232
This Cheapflightsfares deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:57 pm -
1 stop10h 24m
Tue 10/135:50 am -
Nonstop4h 10m
Deal found 9/14![Frontier logo]()
$238
This Frontier deal was found by Cheapflights users on 9/14. 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 10/167:37 pm -
Nonstop3h 39m
Mon 10/195:50 am -
Nonstop4h 10m
Deal found 9/14![Frontier logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/56:57 pm -
1 stop10h 24m
Sat 11/78:39 am -
1 stop14h 53m
Deal found 9/15![Frontier logo]()
$240
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:46 pm -
Nonstop3h 43m
Sat 10/103:52 pm -
Nonstop4h 07m
Deal found 9/16![United Airlines logo]()
$241
This Southwest deal was found by Cheapflights users on 9/13. 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.
Sat 10/245:40 pm -
Nonstop3h 35m
Tue 10/275:30 am -
Nonstop4h 05m
Deal found 9/13![Southwest logo]()
$242
This Justfly.com deal was found by Cheapflights users on 9/15. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/128:45 pm -
1 stop8h 33m
Sat 10/2412:35 pm -
1 stop10h 56m
Deal found 9/15![Frontier logo]()
$243
This Travelocity deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2511:00 am -
1 stop11h 39m
Mon 1/1112:46 pm -
1 stop21h 35m
Deal found 9/16![Frontier logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:55 pm -
1 stop21h 09m
Mon 10/265:22 pm -
1 stop17h 00m
Deal found 9/14![Frontier logo]()
$245
This Super.com deal was found by Cheapflights users on 9/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:37 pm -
Nonstop3h 39m
Sun 10/185:50 am -
Nonstop4h 10m
Deal found 9/15![Frontier logo]()
$246
This Frontier deal was found by Cheapflights users on 9/15. 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.
Tue 10/136:42 pm -
1 stop10h 36m
Thu 10/228:44 pm -
1 stop15h 05m
Deal found 9/15![Frontier logo]()
$247
This CheapOair deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:57 pm -
1 stop26h 14m
Sun 10/115:50 am -
Nonstop4h 10m
Deal found 9/16![Frontier logo]()
$248
Best flights from Denver to PhiladelphiaDiscover carefully curated flight deals from Denver to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.
Discover carefully curated flight deals from Denver to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:00 pm -
1 stop5h 56m
Sat 10/179:48 am -
1 stop7h 18m
Deal found 9/15![Delta logo]()
$261
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 12/2311:59 pm -
Nonstop3h 32m
Tue 1/58:00 am -
Nonstop4h 05m
Deal found 9/17![United Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 9/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/411:05 am -
2 stops8h 20m
Wed 11/117:30 am -
2 stops10h 30m
Deal found 9/15![Southwest logo]()
$271
This Southwest deal was found by Cheapflights users on 9/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/56:45 pm -
Nonstop3h 25m
Mon 11/96:25 pm -
1 stop6h 50m
Deal found 9/15![Southwest logo]()
$287
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/87:30 pm -
Nonstop3h 25m
Sat 2/135:10 am -
Nonstop4h 15m
Deal found 9/16![Southwest logo]()
$290
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/139:48 am -
1 stop5h 49m
Sun 2/288:00 am -
Nonstop4h 05m
Deal found 9/15![United Airlines logo]()
$362
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:51 am -
1 stop7h 23m
Tue 10/68:00 am -
Nonstop4h 02m
Deal found 9/15![United Airlines logo]()
$376
This Southwest deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” 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 11/86:45 pm -
Nonstop3h 25m
Sat 11/142:45 pm -
1 stop6h 05m
Deal found 9/18![Southwest logo]()
$374
This Southwest deal was found by Cheapflights users on 9/14. 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.
Wed 11/1812:25 pm -
2 stops7h 45m
Sun 11/225:30 am -
2 stops8h 45m
Deal found 9/14![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” 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 1/116:00 pm -
Nonstop3h 25m
Thu 1/145:20 am -
Nonstop4h 15m
Deal found 9/18![Southwest logo]()
$388
This Southwest deal was found by Cheapflights users on 9/13. 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 10/161:30 pm -
Nonstop3h 30m
Sun 10/185:20 am -
Nonstop4h 05m
Deal found 9/13![Southwest logo]()
$407
Last-minute flights from Denver to PhiladelphiaDiscover last-minute flight deals from Denver to Philadelphia. Data last updated September 18, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Philadelphia. Data last updated September 18, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:46 pm -
Nonstop3h 43m
Sat 10/103:52 pm -
Nonstop4h 07m
Deal found 9/16![United Airlines logo]()
$241
This Cheapflightsfares deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:57 pm -
1 stop10h 24m
Tue 10/135:50 am -
Nonstop4h 10m
Deal found 9/14![Frontier logo]()
$238
This CheapOair deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:57 pm -
1 stop26h 14m
Sun 10/115:50 am -
Nonstop4h 10m
Deal found 9/16![Frontier logo]()
$248
This Justfly.com deal was found by Cheapflights users on 9/15. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/128:45 pm -
1 stop8h 33m
Sat 10/2412:35 pm -
1 stop10h 56m
Deal found 9/15![Frontier logo]()
$243
This Frontier deal was found by Cheapflights users on 9/15. 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.
Tue 10/136:42 pm -
1 stop10h 36m
Thu 10/228:44 pm -
1 stop15h 05m
Deal found 9/15![Frontier logo]()
$247
This Frontier deal was found by Cheapflights users on 9/14. 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 10/167:37 pm -
Nonstop3h 39m
Mon 10/195:50 am -
Nonstop4h 10m
Deal found 9/14![Frontier logo]()
$239
This Super.com deal was found by Cheapflights users on 9/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:37 pm -
Nonstop3h 39m
Sun 10/185:50 am -
Nonstop4h 10m
Deal found 9/15![Frontier logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:57 pm -
1 stop10h 14m
Sun 10/258:44 pm -
2 stops37h 35m
Deal found 9/16![Frontier logo]()
$251
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:55 pm -
1 stop21h 09m
Mon 10/265:22 pm -
1 stop17h 00m
Deal found 9/14![Frontier logo]()
$245
This Southwest deal was found by Cheapflights users on 9/13. 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.
Sat 10/245:40 pm -
Nonstop3h 35m
Tue 10/275:30 am -
Nonstop4h 05m
Deal found 9/13![Southwest logo]()
$242
One-way flights from Denver to PhiladelphiaSearch for one-way flight options from Denver to Philadelphia. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.
Search for one-way flight options from Denver to Philadelphia. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/166:30 am -
2 stops22h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/128:55 pm -
2 stops32h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$148
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:15 am -
1 stop8h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Delta logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/59:16 pm -
2 stops18h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 11/266:20 am -
2 stops12h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 12/1110:26 am -
2 stops10h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$154
This Super.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/3011:59 pm -
Nonstop3h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$155
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:35 pm -
Nonstop3h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Southwest logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1511:21 am -
2 stops10h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” 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 11/196:30 am -
2 stops11h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$158
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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.
Sat 10/106:05 am -
1 stop6h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/189:12 pm -
2 stops32h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$160
Find flight deals from Denver to Philadelphia
Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Philadelphia (PHL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $232 (Cheapflightsfares) |
One-way from | $147 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $384 |
Good round-trip deal | $341 or less |
Good one-way deal | $189 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Denver 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 September 18, 2026.
Use the filters below to find and compare flights from Denver 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 10/5
5:37 pm-11:20 pm
Nonstop3h 43m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$169
Quickest round-trip
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Tue 11/17
6:08 pm-11:39 pm
Nonstop3h 31m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$171
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Thu 12/17
8:10 am-6:45 pm
2 stops8h 35m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$181
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Fri 10/9
6:57 pm-7:21 am
1 stop10h 24m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$188
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Sat 11/7
2:00 pm-7:31 pm
Nonstop3h 31m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$192
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Fri 11/13
6:08 pm-11:39 pm
Nonstop3h 31m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$216
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Fri 11/6
8:10 am-6:45 pm
2 stops8h 35m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$219
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Sun 10/25
12:30 pm-1:00 am
2 stops10h 30m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$229
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Sat 10/24
1:53 pm-7:33 pm
Nonstop3h 40m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$242
DenverPhiladelphia
DEN Denver Intl - PHL Philadelphia
DENPHL
Denver Intl
Thu 10/1
11:21 am-7:16 am
2 stops17h 55m
Philadelphia
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$249
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Denver to Philadelphia
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Philadelphia in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Denver-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Philadelphia flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Denver-Philadelphia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Denver to Philadelphia
Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Denver with our price prediction graph.
DEN-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.
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Everything you need to know about your flight from Denver to Philadelphia
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Airlines
How far ahead should I book a flight from Denver to Philadelphia?
To ensure you get the cheapest price possible for a flight from Denver to Philadelphia, you should look to book at least 40 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 month to book a flight from Denver to Philadelphia?
Currently, February is the cheapest month in which you can book a flight from Denver to Philadelphia (average of $271). Flying from Denver to Philadelphia in June is currently the most expensive (average of $467). 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 DEN to PHL?
Find hourly flight availability from Denver 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 September 18, 2026.
It’s typically best to fly out from Denver to Philadelphia in the evening. Doing so could potentially save you 36% on the flight price compared to flying in the afternoon, which is usually more expensive.
What is the cheapest day to fly from Denver to Philadelphia?
Use this chart to determine the cheapest time to fly round-trip from Denver to Philadelphia. Price data was last updated on September 12, 2026.
Travelers seeking maximum savings on their Denver 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.
The best insider tips for Denver to Philadelphia flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Denver to Philadelphia trip
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Reviews of airlines servicing Philadelphia
Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated September 18, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andAmerican Airlines from Denver to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Related info for your journey
Find useful and relevant information for your journey from Denver 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
Wildwood Crest
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Pottstown
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Vineland
Millville
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Denver and Philadelphia flights
Browse other Denver and Philadelphia flight options. Last updated on September 18, 2026.
Other flights from Denver
Browse through other flights departing from Denver. Flights are based on user searches made on Cheapflights and were last updated on September 18, 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 September 18, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Top 6 airlines flying from Denver to Philadelphia
Discover the top 6 airlines that operate flights from Denver 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 September 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$121 | Average$293 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$122 | Average$303 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$128 | Average$343 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$217 | Average$517 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$234 | Average$414 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$241 | Average$482 | FlexibilityNo cancel fee | On-time63% |