Southwest Airlines is the most reliable airline on the AUS to ONT route with a 73% on-time rate. Based on 1,275 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: AUS to ONT
Austin to Ontario — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines73%
AUS to ONT Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 73% | 0.6% | 45m | 1,275 |
Route Overview
73%
Overall On-Time
45m
Avg Delay
0.5%
Cancel Rate
1,275
Total Flights
Flying out of AUS? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.