Ontario to Phoenix

What the Data Says About ONT to PHX

The Ontario to Phoenix corridor (ONT → PHX) covers roughly 325 miles and is served by 39 carriers, based on Bureau of Transportation Statistics reporting. Across 16,845 flights in the dataset, this route posts a 85% on-time rate with an average delay of 72.7 minutes when flights run late. Over the most recent 24 months of BTS data, 6,480 flights were recorded on this pairing — 34 cancelled (0.5%) and 3 diverted (0.0%). 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 16,845 total flights analyzed, the 85% on-time figure is statistically meaningful rather than a small-sample fluke. The 72.7-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, Feb 2025 posted the best performance on this corridor at 93% on-time, while Nov 2025 came in at 74% on-time — a 19-point gap between best and worst recent month. For travelers evaluating the ONT to PHX route, the combination of a 85% on-time rate, 72.7-minute average delay, 0.5% recent cancellation rate, and 39 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.