Frontier Airlines is the most reliable airline on the SMF to ONT route with a 90% on-time rate, compared to Southwest Airlines at 86%. Based on 146 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SMF to ONT
Sacramento to Ontario — airline reliability comparison
On-Time Rate by Airline
Frontier Airlines90%
Southwest Airlines86%
SMF to ONT Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Frontier AirlinesF9Best | 90% | 0.8% | 48m | 146 |
| Southwest AirlinesWNWorst | 86% | 0.4% | 53m | 6,974 |
Route Overview
86%
Overall On-Time
54m
Avg Delay
0.4%
Cancel Rate
7,124
Total Flights
Flying out of SMF? 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.