Pittsburgh (PIT) to St Louis (STL) flights
Southwest Airlines flies nonstop from Pittsburgh International Airport to St. Louis Lambert International Airport, with about 13 flights a week in July 2026. The 554-mile flight takes about 1h 40m gate to gate.
- Distance
- 554 mi · 892 km
- Flight time
- 1h 40m
- Airlines
- 1
- Seats filled
- 63%
Airlines flying PIT to STL
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 13 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Boeing 737-800 | 48,391 | 1h 40m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
PIT to STL flight schedule
3 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 6:40am and the last at 7:20pm. 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) |
|---|---|---|---|---|
| WN 1482Southwest Airlines | 6:40am | 7:20am | 8 | n/a |
| WN 3311Southwest Airlines | 7:00am | 7:45am | 20 | 90% |
| WN 3312Southwest Airlines | 7:20pm | 8:00pm | 24 | 54% |
Is PIT to STL on time?
From September 2025 to August 2026, 81% of 521 flights arrived within 15 minutes of schedule and 0.2% were cancelled. Flights leaving around 6am were the most punctual (96%), those around 8pm the least (49%). Most delay time was caused by late-arriving aircraft (74%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 521 | 81% | 11 min | 0.2% |
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 | 143 | 96% | |
| 7am to 8am | 53 | 94% | |
| 8am to 9am | 17 | 94% | |
| 12pm to 1pm | 45 | 89% | |
| 1pm to 2pm | 20 | 85% | |
| 2pm to 3pm | 13 | 92% | |
| 3pm to 4pm | 24 | 96% | |
| 4pm to 5pm | 13 | 85% | |
| 5pm to 6pm | 13 | 54% | |
| 6pm to 7pm | 14 | 85% | |
| 7pm to 8pm | 71 | 65% | |
| 8pm to 9pm | 90 | 49% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 35 | 3,679 | |
| September 2025 | 34 | 3,342 | |
| October 2025 | 35 | 3,667 | |
| November 2025 | 31 | 3,682 | |
| December 2025 | 31 | 3,155 | |
| January 2026 | 27 | 2,231 | |
| February 2026 | 27 | 2,232 | |
| March 2026 | 55 | 5,165 | |
| April 2026 | 56 | 5,045 | |
| May 2026 | 56 | 5,007 | |
| June 2026 | 55 | 5,476 | |
| July 2026 | 59 | 5,775 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.