Southwest Airlines is the most reliable airline on the DAL to ONT route with a 74% on-time rate. Based on 1,373 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: DAL to ONT
Dallas to Ontario — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines74%
DAL to ONT Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 74% | 1.0% | 54m | 1,373 |
Route Overview
74%
Overall On-Time
54m
Avg Delay
1%
Cancel Rate
1,373
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.