Frontier Airlines is the most reliable airline on the ONT to SMF route with a 92% on-time rate, compared to Southwest Airlines at 87%. Based on 146 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: ONT to SMF
Ontario to Sacramento — airline reliability comparison
On-Time Rate by Airline
Frontier Airlines92%
Southwest Airlines87%
ONT to SMF Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Frontier AirlinesF9Best | 92% | 1.3% | 34m | 146 |
| Southwest AirlinesWNWorst | 87% | 0.3% | 52m | 6,943 |
Route Overview
87%
Overall On-Time
52m
Avg Delay
0.3%
Cancel Rate
7,093
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.