How often are PHX to ONT flights on time?

Flights from Phoenix (PHX) to Ontario (ONT) arrive on time 82% of the time across 18,240 flights of official data.

Which airline is most reliable on the PHX to ONT route?

American Airlines has the best on-time record on this route at 84% across 8,109 flights.

Route reliability

Flights from Phoenix to Ontario arrive on time 82% of the time across 18,240 flights. Here’s how each airline really performs.

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On-time rate

18,240 flights

On-time = arrived within 15 minutes of schedule, per BTS TranStats. Compare the reverse leg ONT → PHX.

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Score real PHX–ONT flights on reliability, weather, and connection safety — not just price.