St Louis (STL) to Austin (AUS) flights
Southwest Airlines flies nonstop from St. Louis Lambert International Airport to Austin Bergstrom International Airport, with about 20 flights a week in July 2026. The 721-mile flight takes about 1h 59m gate to gate.
- Distance
- 721 mi · 1,160 km
- Flight time
- 1h 59m
- Airlines
- 1
- Seats filled
- 72%
Airlines flying STL to AUS
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 20 | Boeing 737 MAX 8, Boeing 737-700 / MAX 7, Boeing 737-800 | 114,999 | 1h 59m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to AUS flight schedule
6 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 8:25am and the last at 8:50pm. 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 2158Southwest Airlines | 8:25am | 10:25am | 24 | 88% |
| WN 3710Southwest Airlines | 8:30am | 10:30am | 4 | n/a |
| WN 661Southwest Airlines | 1:40pm | 3:40pm | 4 | n/a |
| WN 2535Southwest Airlines | 3:45pm | 5:45pm | 12 | 67% |
| WN 1638Southwest Airlines | 8:45pm | 10:45pm | 16 | 50% |
| WN 3803Southwest Airlines | 8:50pm | 10:50pm | 8 | n/a |
Is STL to AUS on time?
From September 2025 to August 2026, 75% of 972 flights arrived within 15 minutes of schedule and 0.3% were cancelled. Flights leaving around 10am were the most punctual (90%), those around 10pm the least (59%). Most delay time was caused by late-arriving aircraft (64%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 972 | 75% | 15 min | 0.3% |
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 |
|---|---|---|---|
| 8am to 9am | 180 | 88% | |
| 9am to 10am | 52 | 80% | |
| 10am to 11am | 123 | 90% | |
| 1pm to 2pm | 64 | 69% | |
| 2pm to 3pm | 70 | 61% | |
| 3pm to 4pm | 103 | 69% | |
| 4pm to 5pm | 27 | 93% | |
| 5pm to 6pm | 25 | 64% | |
| 7pm to 8pm | 29 | 93% | |
| 8pm to 9pm | 89 | 73% | |
| 9pm to 10pm | 112 | 66% | |
| 10pm to 11pm | 73 | 59% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 76 | 9,610 | |
| September 2025 | 73 | 9,347 | |
| October 2025 | 83 | 10,516 | |
| November 2025 | 85 | 10,158 | |
| December 2025 | 91 | 11,015 | |
| January 2026 | 61 | 6,582 | |
| February 2026 | 59 | 6,585 | |
| March 2026 | 85 | 9,326 | |
| April 2026 | 90 | 9,761 | |
| May 2026 | 91 | 11,545 | |
| June 2026 | 87 | 10,296 | |
| July 2026 | 89 | 10,425 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.