Baltimore (BWI) to St Louis (STL) flights
Southwest Airlines flies nonstop from Baltimore/Washington International Thurgood Marshall Airport to St. Louis Lambert International Airport, with about 28 flights a week in July 2026. The 738-mile flight takes about 2h 11m gate to gate.
- Distance
- 738 mi · 1,188 km
- Flight time
- 2h 11m
- Airlines
- 1
- Seats filled
- 63%
Airlines flying BWI to STL
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 28 | Boeing 737 MAX 8, Boeing 737-700 / MAX 7, Boeing 737-800 | 129,088 | 2h 11m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
BWI to STL flight schedule
6 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 6:35am and the last at 8:30pm. 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 1096Southwest Airlines | 6:35am | 7:45am | 24 | 88% |
| WN 1097Southwest Airlines | 10:25am | 11:35am | 28 | 96% |
| WN 1098Southwest Airlines | 1:40pm | 2:50pm | 12 | 92% |
| WN 1404Southwest Airlines | 5:15pm | 6:25pm | 12 | 60% |
| WN 4749Southwest Airlines | 7:55pm | 9:10pm | 16 | 56% |
| WN 339Southwest Airlines | 8:30pm | 9:40pm | 12 | 10% |
Is BWI to STL on time?
From September 2025 to August 2026, 81% of 1,260 flights arrived within 15 minutes of schedule and 1.3% were cancelled. Flights leaving around 6am were the most punctual (93%), those around 7pm the least (59%). Most delay time was caused by late-arriving aircraft (50%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 1,260 | 81% | 11 min | 1.3% |
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 | 201 | 93% | |
| 7am to 8am | 140 | 91% | |
| 8am to 9am | 35 | 94% | |
| 9am to 10am | 96 | 87% | |
| 10am to 11am | 73 | 90% | |
| 11am to 12pm | 37 | 92% | |
| 1pm to 2pm | 48 | 85% | |
| 2pm to 3pm | 69 | 81% | |
| 3pm to 4pm | 78 | 83% | |
| 5pm to 6pm | 57 | 74% | |
| 6pm to 7pm | 83 | 76% | |
| 7pm to 8pm | 88 | 59% | |
| 8pm to 9pm | 63 | 64% | |
| 9pm to 10pm | 110 | 64% | |
| 10pm to 11pm | 64 | 79% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 128 | 14,445 | |
| September 2025 | 118 | 12,606 | |
| October 2025 | 106 | 12,991 | |
| November 2025 | 106 | 10,898 | |
| December 2025 | 99 | 9,733 | |
| January 2026 | 69 | 6,463 | |
| February 2026 | 74 | 6,703 | |
| March 2026 | 108 | 11,278 | |
| April 2026 | 107 | 9,628 | |
| May 2026 | 111 | 10,925 | |
| June 2026 | 110 | 11,594 | |
| July 2026 | 123 | 11,824 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.