is the most reliable airline on the PHX to ONT route with a 92% on-time rate, compared to Southwest Airlines at 79%. Based on 279 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: PHX to ONT
Phoenix to Ontario — airline reliability comparison
On-Time Rate by Airline
92%
SkyWest Airlines88%
Frontier Airlines83%
American Airlines81%
Southwest Airlines79%
PHX to ONT Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| MQBest | 92% | 0.0% | 40m | 279 |
| SkyWest AirlinesOO | 88% | 0.2% | 46m | 827 |
| Frontier AirlinesF9 | 83% | 1.6% | 46m | 216 |
| American AirlinesAA | 81% | 0.5% | 68m | 3,794 |
| Southwest AirlinesWNWorst | 79% | 0.3% | 49m | 5,869 |
Route Overview
81%
Overall On-Time
55m
Avg Delay
0.4%
Cancel Rate
11,037
Total Flights
Flying out of PHX? 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.