Philadelphia (PHL) to Denver (DEN) flights

American Airlines, United Airlines, Southwest Airlines, Frontier Airlines fly nonstop from Philadelphia International Airport to Denver International Airport, with about 74 flights a week in July 2026. The 1,558-mile flight takes about 4h 9m gate to gate.

From
PHL
Philadelphia
Philadelphia International Airport
To
DEN
Denver
Denver International Airport
Distance
1,558 mi · 2,507 km
Flight time
4h 9m
Airlines
4
Seats filled
86%
Flights a week, July 2026
2,984 flights and 453,281 passengers in 12 months
DENDENPHL
Map data: Natural Earth. Lines follow the shortest (great-circle) path.

Airlines flying PHL to DEN

AirlineFlights a weekAircraftPassengers (12 months)Flight time
American Airlines25Airbus A321, Boeing 737-800, Boeing 737 MAX 8130,9224h 11m
United Airlines20Boeing 737-800, Boeing 737-900ER, Boeing 737 MAX 8142,1034h 10m
Southwest Airlines19Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7129,2834h 3m
Frontier Airlines10Airbus A321, Airbus A320neo, Airbus A320-100/20050,9734h 15m

Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.

PHL to DEN flight schedule

16 flight numbers flew this route in August 2026, 9 of them almost daily. The first usually leaves at 5:25am and the last at 8:37pm. Times are local and can change; check with the airline before you book.

FlightDepartsArrivesDays flown in August 2026On time (12 months)
WN 570Southwest Airlines5:25am7:15am12100%
AA 2878American Airlines7:30am9:39am2396%
UA 2307United Airlines8:00am10:01am1078%
UA 2817United Airlines8:00am10:05am2186%
AA 3312American Airlines9:35am11:56am485%
AA 1313American Airlines9:37am11:53am2776%
UA 1537United Airlines10:05am12:10pm3180%
AA 2082American Airlines12:07pm2:18pm2084%
WN 384Southwest Airlines12:35pm2:25pm1644%
F9 2513Frontier Airlines12:44pm2:58pm1672%
WN 3147Southwest Airlines1:05pm2:55pm2861%
UA 2644United Airlines3:48pm5:55pm3149%
WN 1011Southwest Airlines4:05pm6:05pm120%
WN 4335Southwest Airlines5:10pm7:10pm1414%
AA 3158American Airlines8:10pm10:43pm3165%
F9 3339Frontier Airlines8:37pm11:04pm2463%

Is PHL to DEN on time?

From September 2025 to August 2026, 73% of 3,060 flights arrived within 15 minutes of schedule and 1.5% were cancelled. Flights leaving around 9am were the most punctual (88%), those around 5pm the least (49%). Most delay time was caused by late-arriving aircraft (34%).

AirlineFlightsOn timeAverage delayCancelled
United Airlines95382%16 min0.7%
American Airlines92674%18 min2.1%
Southwest Airlines88066%21 min1.1%
Frontier Airlines30165%43 min3.7%

Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.

On-time arrivals by departure time

Scheduled departureFlightsOn time, relativeOn time
5am to 6am208
87%
6am to 7am143
79%
7am to 8am89
88%
8am to 9am470
84%
9am to 10am226
88%
10am to 11am218
82%
11am to 12pm121
78%
12pm to 1pm171
73%
1pm to 2pm65
52%
3pm to 4pm305
78%
4pm to 5pm195
50%
5pm to 6pm237
49%
6pm to 7pm74
63%
7pm to 8pm147
70%
8pm to 9pm314
59%

Flights by month

MonthFlightsFlights, relativePassengers
August 2025304
49,027
September 2025281
44,233
October 2025248
39,057
November 2025238
33,949
December 2025232
35,691
January 2026171
24,725
February 2026167
24,359
March 2026202
30,248
April 2026224
31,234
May 2026276
40,015
June 2026313
48,695
July 2026328
52,048

Related

Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.