St Louis (STL) to San Antonio (SAT) flights
Southwest Airlines flies nonstop from St. Louis Lambert International Airport to San Antonio International Airport, with about 12 flights a week in July 2026. The 786-mile flight takes about 2h 6m gate to gate.
- Distance
- 786 mi · 1,265 km
- Flight time
- 2h 6m
- Airlines
- 1
- Seats filled
- 67%
Airlines flying STL to SAT
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 12 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Boeing 737-800 | 58,831 | 2h 6m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to SAT flight schedule
5 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 8:30am and the last at 9:15pm. 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 1809Southwest Airlines | 8:30am | 10:35am | 12 | 92% |
| WN 4498Southwest Airlines | 8:40am | 10:50am | 8 | n/a |
| WN 4010Southwest Airlines | 2:25pm | 4:30pm | 4 | n/a |
| WN 4166Southwest Airlines | 8:45pm | 10:55pm | 22 | 82% |
| WN 4390Southwest Airlines | 9:15pm | 11:20pm | 4 | n/a |
Is STL to SAT on time?
From September 2025 to August 2026, 81% of 557 flights arrived within 15 minutes of schedule and 0% were cancelled. Flights leaving around 9am were the most punctual (92%), those around 10pm the least (64%). Most delay time was caused by late-arriving aircraft (60%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 557 | 81% | 10 min | 0% |
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 |
|---|---|---|---|
| 8am to 9am | 157 | 90% | |
| 9am to 10am | 59 | 92% | |
| 10am to 11am | 80 | 90% | |
| 12pm to 1pm | 17 | 94% | |
| 3pm to 4pm | 19 | 68% | |
| 5pm to 6pm | 13 | 77% | |
| 7pm to 8pm | 13 | 85% | |
| 8pm to 9pm | 50 | 76% | |
| 9pm to 10pm | 83 | 65% | |
| 10pm to 11pm | 47 | 64% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 46 | 5,076 | |
| September 2025 | 47 | 5,542 | |
| October 2025 | 52 | 5,621 | |
| November 2025 | 33 | 4,470 | |
| December 2025 | 40 | 5,201 | |
| January 2026 | 28 | 2,968 | |
| February 2026 | 26 | 3,129 | |
| March 2026 | 55 | 6,085 | |
| April 2026 | 56 | 4,666 | |
| May 2026 | 55 | 5,248 | |
| June 2026 | 52 | 5,618 | |
| July 2026 | 54 | 5,207 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.