SkyWest Airlines is the most reliable airline on the ONT to SLC route with a 93% on-time rate, compared to Frontier Airlines at 78%. Based on 1,285 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: ONT to SLC
Ontario to Salt Lake City — airline reliability comparison
On-Time Rate by Airline
SkyWest Airlines93%
Delta Air Lines92%
Frontier Airlines78%
ONT to SLC Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| SkyWest AirlinesOOBest | 93% | 0.2% | 53m | 1,285 |
| Delta Air LinesDL | 92% | 1.7% | 90m | 2,781 |
| Frontier AirlinesF9Worst | 78% | 5.6% | 59m | 140 |
Route Overview
92%
Overall On-Time
86m
Avg Delay
1.2%
Cancel Rate
4,257
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.