Southwest Airlines is the most reliable airline on the ONT to AUS route with a 85% on-time rate. Based on 1,276 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: ONT to AUS
Ontario to Austin — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines85%
ONT to AUS Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 85% | 0.3% | 51m | 1,276 |
Route Overview
85%
Overall On-Time
52m
Avg Delay
0.3%
Cancel Rate
1,277
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.