$128+ Cheap flights from Philadelphia to Denver (PHL - DEN)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
Sep 4 — Sep 111
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Denver 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 Philadelphia to Denver Intl are usually found in January or October, booked 28 days in advance, depart on a Friday or Saturday and return on a Friday
Cheap flight deals from Philadelphia to Denver
Cheapest
Best
Last-minute
One-way
Cheapest flights from Philadelphia to DenverExplore the most affordable flight options available from Philadelphia to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2026.
Explore the most affordable flight options available from Philadelphia to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/712:40 pm -
1 stop10h 23m
Sat 10/1011:59 pm -
Nonstop3h 37m
Deal found 7/31![Frontier logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Mon 9/78:37 pm -
Nonstop4h 27m
Mon 9/217:10 pm -
1 stop10h 06m
Deal found 8/1![Frontier logo]()
$224
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:59 pm -
2 stops38h 05m
Tue 9/2210:44 am -
1 stop10h 34m
Deal found 7/31![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 10/255:38 pm -
1 stop17h 53m
Thu 10/298:26 am -
1 stop28h 21m
Deal found 8/1![Multiple Airlines logo]()
$226
This Cheapflightsfares deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/275:32 pm -
1 stop6h 17m
Mon 8/3111:59 pm -
Nonstop3h 40m
Deal found 7/31![Frontier logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/258:37 pm -
Nonstop4h 27m
Sun 9/611:59 pm -
Nonstop3h 40m
Deal found 7/31![Frontier logo]()
$228
This Frontier deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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.
Thu 8/275:32 pm -
1 stop6h 17m
Sat 9/511:59 pm -
Nonstop3h 40m
Deal found 8/3![Frontier logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:00 am -
1 stop8h 22m
Tue 10/206:30 am -
1 stop9h 45m
Deal found 8/2![Frontier logo]()
$230
This Super.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/258:37 pm -
Nonstop4h 27m
Tue 9/111:59 pm -
Nonstop3h 40m
Deal found 8/3![Frontier logo]()
$231
This Cheapflightsfares deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/228:15 am -
1 stop14h 02m
Thu 8/2712:47 pm -
1 stop15h 43m
Deal found 7/31![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:37 pm -
Nonstop4h 27m
Tue 9/811:59 pm -
1 stop16h 15m
Deal found 8/2![Frontier logo]()
$233
This Cheapflightsfares deal was found by Cheapflights users on 8/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:37 pm -
Nonstop4h 27m
Sat 8/2911:59 pm -
Nonstop3h 40m
Deal found 8/1![Frontier logo]()
$234
Best flights from Philadelphia to DenverDiscover carefully curated flight deals from Philadelphia to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 5, 2026.
Discover carefully curated flight deals from Philadelphia to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 5, 2026.
This Southwest deal was found by Cheapflights users on 8/2. 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.
Mon 9/285:25 am -
Nonstop3h 50m
Wed 9/306:10 pm -
Nonstop3h 45m
Deal found 8/2![Southwest logo]()
$344
This United Airlines deal was found by Cheapflights users on 8/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:01 pm -
1 stop6h 43m
Tue 9/221:45 pm -
Nonstop3h 40m
Deal found 8/4![United Airlines logo]()
$353
This United Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:00 am -
Nonstop4h 02m
Mon 9/2811:52 pm -
1 stop7h 50m
Deal found 8/3![United Airlines logo]()
$355
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 11/76:15 am -
2 stops10h 15m
Tue 11/106:00 am -
2 stops8h 30m
Deal found 7/31![Southwest logo]()
$373
This Southwest deal was found by Cheapflights users on 8/1. 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.
Sun 1/244:40 pm -
Nonstop4h 25m
Wed 1/2711:35 am -
Nonstop3h 25m
Deal found 8/1![Southwest logo]()
$387
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/258:00 am -
Nonstop4h 02m
Mon 9/285:37 pm -
Nonstop3h 43m
Deal found 7/31![United Airlines logo]()
$388
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:35 pm -
Nonstop3h 50m
Thu 10/87:30 pm -
Nonstop3h 30m
Deal found 7/31![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 11/85:00 am -
Nonstop4h 15m
Thu 11/126:45 pm -
Nonstop3h 20m
Deal found 8/3![Southwest logo]()
$388
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/218:35 pm -
1 stop6h 10m
Tue 11/247:00 am -
2 stops8h 20m
Deal found 8/4![Southwest logo]()
$391
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:55 am -
2 stops9h 50m
Sat 9/55:45 am -
1 stop5h 45m
Deal found 8/4![Southwest logo]()
$392
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/298:05 am -
2 stops7h 00m
Tue 9/88:35 am -
2 stops7h 25m
Deal found 8/4![Southwest logo]()
$397
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/256:35 pm -
1 stop5h 30m
Mon 9/286:00 pm -
Nonstop3h 50m
Deal found 7/31![Southwest logo]()
$398
Last-minute flights from Philadelphia to DenverDiscover last-minute flight deals from Philadelphia to Denver. Data last updated August 5, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Denver. Data last updated August 5, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/228:15 am -
1 stop14h 02m
Thu 8/2712:47 pm -
1 stop15h 43m
Deal found 7/31![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/258:37 pm -
Nonstop4h 27m
Sun 9/611:59 pm -
Nonstop3h 40m
Deal found 7/31![Frontier logo]()
$228
This Super.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/258:37 pm -
Nonstop4h 27m
Tue 9/111:59 pm -
Nonstop3h 40m
Deal found 8/3![Frontier logo]()
$231
This Cheapflightsfares deal was found by Cheapflights users on 8/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:37 pm -
Nonstop4h 27m
Sat 8/2911:59 pm -
Nonstop3h 40m
Deal found 8/1![Frontier logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/274:45 pm -
1 stop18h 34m
Wed 9/211:59 pm -
Nonstop3h 40m
Deal found 8/2![Frontier logo]()
$226
This Cheapflightsfares deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/275:32 pm -
1 stop6h 17m
Mon 8/3111:59 pm -
Nonstop3h 40m
Deal found 7/31![Frontier logo]()
$227
This Frontier deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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.
Thu 8/275:32 pm -
1 stop6h 17m
Sat 9/511:59 pm -
Nonstop3h 40m
Deal found 8/3![Frontier logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:37 pm -
Nonstop4h 27m
Tue 9/811:59 pm -
1 stop16h 15m
Deal found 8/2![Frontier logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Mon 9/78:37 pm -
Nonstop4h 27m
Mon 9/217:10 pm -
1 stop10h 06m
Deal found 8/1![Frontier logo]()
$224
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Wed 9/97:59 pm -
2 stops38h 05m
Fri 9/187:10 pm -
1 stop26h 08m
Deal found 8/1![Frontier logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:59 pm -
2 stops38h 05m
Tue 9/2210:44 am -
1 stop10h 34m
Deal found 7/31![Frontier logo]()
$225
One-way flights from Philadelphia to DenverSearch for one-way flight options from Philadelphia to Denver. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
Search for one-way flight options from Philadelphia to Denver. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:30 am -
1 stop15h 35m
Deal found 8/2![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” 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 8/268:30 am -
1 stop15h 40m
Deal found 8/3![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:07 pm -
1 stop23h 16m
Deal found 8/4![Multiple Airlines logo]()
$130
This Cheapflightsfares deal was found by Cheapflights users on 8/4. 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.
Mon 11/237:00 pm -
Nonstop4h 19m
Deal found 8/4![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/256:00 pm -
2 stops29h 24m
Deal found 8/2![Frontier logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/202:45 pm -
2 stops25h 58m
Deal found 8/2![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:40 pm -
2 stops40h 39m
Deal found 7/31![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:32 pm -
2 stops20h 38m
Deal found 8/4![Frontier logo]()
$135
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/214:45 pm -
1 stop18h 34m
Deal found 7/31![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Mon 9/288:41 am -
2 stops14h 58m
Deal found 8/1![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:00 pm -
2 stops29h 24m
Deal found 8/4![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 9/69:20 am -
2 stops16h 43m
Deal found 8/1![Frontier logo]()
$139
Find flight deals from Philadelphia to Denver
Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Denver (DEN). 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 August 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $223 (Kiwi.com) |
One-way from | $128 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $346 |
Good round-trip deal | $317 or less |
Good one-way deal | $188 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Philadelphia to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 5, 2026.
Use the filters below to find and compare flights from Philadelphia to Denver that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Mon 9/28
5:25 am-7:15 am
Nonstop3h 50m
Denver Intl
Wed 9/30
6:10 pm-11:55 pm
Nonstop3h 45m
$344
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Sat 9/19
5:01 pm-9:44 pm
1 stop6h 43m
Denver Intl
Tue 9/22
1:45 pm-7:25 pm
Nonstop3h 40m
$353
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Thu 9/24
8:00 am-10:02 am
Nonstop4h 02m
Denver Intl
Mon 9/28
11:52 pm-9:42 am
1 stop7h 50m
$355
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Sat 11/7
6:15 am-2:30 pm
2 stops10h 15m
Denver Intl
Tue 11/10
6:00 am-4:30 pm
2 stops8h 30m
$373
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Sun 1/24
4:40 pm-7:05 pm
Nonstop4h 25m
Denver Intl
Wed 1/27
11:35 am-5:00 pm
Nonstop3h 25m
$387
Quickest round-trip
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Wed 9/23
12:35 pm-2:25 pm
Nonstop3h 50m
Denver Intl
Thu 10/8
7:30 pm-1:00 am
Nonstop3h 30m
$387
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Fri 9/25
8:00 am-10:02 am
Nonstop4h 02m
Denver Intl
Mon 9/28
5:37 pm-11:20 pm
Nonstop3h 43m
$388
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Sun 11/8
5:00 am-7:15 am
Nonstop4h 15m
Denver Intl
Thu 11/12
6:45 pm-12:05 am
Nonstop3h 20m
$388
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Sat 11/21
8:35 pm-12:45 am
1 stop6h 10m
Denver Intl
Tue 11/24
7:00 am-5:20 pm
2 stops8h 20m
$391
PhiladelphiaDenver
PHL - DEN
PHLDEN
Philadelphia
Thu 8/27
5:55 am-1:45 pm
2 stops9h 50m
Denver Intl
Sat 9/5
5:45 am-1:30 pm
1 stop5h 45m
$392
Showing 1-10 of 24 resultsSorted by cheapest first
Compare providers for flights from Philadelphia to Denver
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 Philadelphia to Denver in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Philadelphia-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Denver flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Philadelphia-Denver 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 Philadelphia-Denver 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 Philadelphia to Denver
Have a flexible travel schedule? Discover the best time to fly to Denver from Philadelphia with our price prediction graph.
PHL-DEN
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Philadelphia to Denver
Prices
Airlines
Delays
How far ahead should I book a flight from Philadelphia to Denver?
Booking 27 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to Denver. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Philadelphia to Denver?
Currently, January is the cheapest month in which you can book a flight from Philadelphia to Denver (average of $304). Flying from Philadelphia to Denver in June is currently the most expensive (average of $471). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from PHL to DEN?
Find hourly flight availability from Philadelphia to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 5, 2026.
It’s typically best to fly out from Philadelphia to Denver in the evening. Doing so could potentially save you 38% on the flight price compared to flying in the afternoon, which is usually more expensive.
What is the cheapest day to fly from Philadelphia to Denver?
Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Denver. Price data was last updated on August 1, 2026.
Travelers seeking maximum savings on their Philadelphia to Denver flight should consider departing on Tuesday evenings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from Philadelphia to Denver delayed?
About 19% of weekly flights between Philadelphia and Denver have experienced delays in the past year, with the average delay time being 156 minutes.
What is the most punctual flight time for Philadelphia to Denver flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Philadelphia to Denver flights?
Over the last year, United Airlines have had the lowest number of delays on this route, with just 12% of flights being delayed.
The best insider tips for Philadelphia to Denver 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 Philadelphia to Denver trip
Our travel experts
Reviews of airlines servicing Denver
Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated August 5, 2026.
Peruse reviews from past customers who have flown with Southwest,United Airlines, andAmerican Airlines from Philadelphia to Denver to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Denver. 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 Denver?
Book flights to Denver if you plan to visit one of these locationsThornton
Westminster
Black Hawk
Centennial
Lakewood
Broomfield
Golden
Lone Tree
Wheat Ridge
Silverthorne
Central City
Fort Morgan
Cripple Creek
Greeley
Winter Park
Limon
Manitou Springs
Frisco
Englewood
Glendale
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Complete your trip
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Other flights to Denver
Explore flights to Denver departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 5, 2026.
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Philadelphia and Denver flights
Browse other Philadelphia and Denver flight options. Last updated on August 5, 2026.
Other flights from Philadelphia
Browse through other flights departing from Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on August 5, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Top 6 airlines flying from Philadelphia to Denver
Discover the top 6 airlines that operate flights from Philadelphia to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$94 | Average$255 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$197 | Average$424 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$218 | Average$427 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$220 | Average$312 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$231 | Average$420 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$236 | Average$416 | FlexibilityNo cancel fee | On-timeN/A |