Phoenix to Ontario

What the Data Says About PHX to ONT

The Phoenix to Ontario corridor (PHX → ONT) covers roughly 325 miles and is served by 39 carriers, based on Bureau of Transportation Statistics reporting. Across 16,938 flights in the dataset, this route posts a 81.2% on-time rate with an average delay of 63.4 minutes when flights run late. Over the most recent 24 months of BTS data, 6,472 flights were recorded on this pairing — 25 cancelled (0.4%) and 7 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 39 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 16,938 total flights analyzed, the 81.2% on-time figure is statistically meaningful rather than a small-sample fluke. The 63.4-minute average delay applies only to flights that actually ran late, so it is not the average wait across all departures — the majority of flights on this route depart on time under the BTS definition of a delay (15+ minutes past schedule).

Looking at recent months, Jan 2025 posted the best performance on this corridor at 88% on-time, while May 2024 came in at 69% on-time — a 19-point gap between best and worst recent month. For travelers evaluating the PHX to ONT route, the combination of a 81.2% on-time rate, 63.4-minute average delay, 0.4% recent cancellation rate, and 39 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.