St Louis (STL) to Philadelphia (PHL) flights
American Airlines, Southwest Airlines, PSA Airlines fly nonstop from St. Louis Lambert International Airport to Philadelphia International Airport, with about 32 flights a week in July 2026. The 814-mile flight takes about 2h 6m gate to gate.
- Distance
- 814 mi · 1,310 km
- Flight time
- 2h 6m
- Airlines
- 3
- Seats filled
- 74%
Airlines flying STL to PHL
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| American Airlines | 19 | Airbus A319, Airbus A320-100/200, Airbus A321 | 56,483 | 2h 9m |
| Southwest Airlines | 13 | Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7 | 91,896 | 2h 2m |
| PSA Airlines | <1 | Bombardier CRJ900, Bombardier CRJ700 | 6,534 | 2h 8m |
| Republic AirlineSeasonal or ended | n/a | Embraer E175 | 6,144 | 2h 8m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to PHL flight schedule
10 flight numbers flew this route in August 2026, 3 of them almost daily. The first usually leaves at 6:00am and the last at 7:05pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AA 1308American Airlines | 6:00am | 9:22am | 27 | 91% |
| WN 939Southwest Airlines | 10:15am | 1:25pm | 4 | n/a |
| WN 2384Southwest Airlines | 10:20am | 1:30pm | 12 | 92% |
| WN 4508Southwest Airlines | 10:55am | 2:05pm | 12 | 75% |
| AA 1739American Airlines | 11:19am | 2:38pm | 4 | 82% |
| AA 5054American Airlines · operated by PSA Airlines | 11:22am | 2:39pm | 23 | 41% |
| AA 3049American Airlines | 5:42pm | 9:03pm | 26 | 67% |
| AA 2714American Airlines | 5:48pm | 9:10pm | 4 | 71% |
| WN 1160Southwest Airlines | 6:40pm | 9:50pm | 12 | 25% |
| WN 1822Southwest Airlines | 7:05pm | 10:15pm | 12 | 17% |
Is STL to PHL on time?
From September 2025 to August 2026, 79% of 1,606 flights arrived within 15 minutes of schedule and 1.8% were cancelled. Flights leaving around 8am were the most punctual (97%), those around 7pm the least (57%). Most delay time was caused by late-arriving aircraft (53%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| American Airlines | 881 | 84% | 22 min | 3% |
| Southwest Airlines | 725 | 73% | 17 min | 0.4% |
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 departure | Flights | On time, relative | On time |
|---|---|---|---|
| 6am to 7am | 336 | 91% | |
| 7am to 8am | 46 | 86% | |
| 8am to 9am | 103 | 97% | |
| 9am to 10am | 39 | 87% | |
| 10am to 11am | 181 | 86% | |
| 11am to 12pm | 109 | 78% | |
| 12pm to 1pm | 57 | 81% | |
| 1pm to 2pm | 168 | 77% | |
| 2pm to 3pm | 86 | 74% | |
| 4pm to 5pm | 51 | 68% | |
| 5pm to 6pm | 129 | 70% | |
| 6pm to 7pm | 85 | 64% | |
| 7pm to 8pm | 98 | 57% | |
| 8pm to 9pm | 66 | 59% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 141 | 16,148 | |
| September 2025 | 132 | 14,773 | |
| October 2025 | 148 | 15,942 | |
| November 2025 | 161 | 13,856 | |
| December 2025 | 147 | 13,691 | |
| January 2026 | 97 | 6,596 | |
| February 2026 | 77 | 5,811 | |
| March 2026 | 115 | 12,532 | |
| April 2026 | 129 | 13,900 | |
| May 2026 | 142 | 17,197 | |
| June 2026 | 147 | 15,332 | |
| July 2026 | 143 | 15,279 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.