is the most reliable airline on the ONT to PHX route with a 94% on-time rate, compared to Frontier Airlines at 78%. Based on 279 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: ONT to PHX
Ontario to Phoenix — airline reliability comparison
On-Time Rate by Airline
94%
SkyWest Airlines87%
American Airlines86%
Southwest Airlines84%
Frontier Airlines78%
ONT to PHX Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| MQBest | 94% | 0.0% | 49m | 279 |
| SkyWest AirlinesOO | 87% | 0.2% | 90m | 827 |
| American AirlinesAA | 86% | 0.5% | 100m | 3,794 |
| Southwest AirlinesWN | 84% | 0.5% | 51m | 5,877 |
| Frontier AirlinesF9Worst | 78% | 2.6% | 121m | 215 |
Route Overview
85%
Overall On-Time
71m
Avg Delay
0.5%
Cancel Rate
11,044
Total Flights
Flying out of ONT? We'll brief you.
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Data last updated October 2026. Source: Bureau of Transportation Statistics.