Ontario (ONT) to Austin (AUS) flights
Southwest Airlines flies nonstop from Ontario International Airport to Austin Bergstrom International Airport, with about 7 flights a week in July 2026. The 1,196-mile flight takes about 2h 43m gate to gate.
- Distance
- 1,196 mi · 1,925 km
- Flight time
- 2h 43m
- Airlines
- 1
- Seats filled
- 79%
Airlines flying ONT to AUS
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 7 | Boeing 737 MAX 8, Boeing 737-700 / MAX 7, Boeing 737-800 | 43,332 | 2h 43m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
ONT to AUS flight schedule
2 flight numbers flew this route in August 2026. The first usually leaves at 8:30am and the last at 12:50pm. 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 2803Southwest Airlines | 8:30am | 1:20pm | 8 | n/a |
| WN 3171Southwest Airlines | 12:50pm | 5:40pm | 16 | 69% |
Is ONT to AUS on time?
From September 2025 to August 2026, 73% of 338 flights arrived within 15 minutes of schedule and 0.3% were cancelled. Flights leaving around 9am were the most punctual (77%), those around 2pm the least (59%). Most delay time was caused by air traffic control and airport congestion (35%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 337 | 74% | 12 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 |
|---|---|---|---|
| 7am to 8am | 12 | 92% | |
| 8am to 9am | 24 | 75% | |
| 9am to 10am | 78 | 77% | |
| 10am to 11am | 88 | 76% | |
| 11am to 12pm | 35 | 68% | |
| 12pm to 1pm | 48 | 73% | |
| 1pm to 2pm | 18 | 61% | |
| 2pm to 3pm | 27 | 59% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 26 | 3,174 | |
| September 2025 | 27 | 3,593 | |
| October 2025 | 27 | 3,474 | |
| November 2025 | 29 | 3,752 | |
| December 2025 | 30 | 3,700 | |
| January 2026 | 28 | 2,460 | |
| February 2026 | 24 | 2,904 | |
| March 2026 | 33 | 4,734 | |
| April 2026 | 27 | 3,790 | |
| May 2026 | 26 | 3,616 | |
| June 2026 | 30 | 4,438 | |
| July 2026 | 31 | 4,253 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.