Southwest Airlines is the most reliable airline on the SJC to ONT route with a 85% on-time rate. Based on 4,981 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SJC to ONT
San Jose to Ontario — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines85%
SJC to ONT Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 85% | 0.4% | 50m | 4,981 |
Route Overview
85%
Overall On-Time
50m
Avg Delay
0.4%
Cancel Rate
4,981
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.