Ontario to Salt Lake City

What the Data Says About ONT to SLC

The Ontario to Salt Lake City corridor (ONT → SLC) covers roughly 558 miles and is served by 8 carriers, based on Bureau of Transportation Statistics reporting. Across 7,786 flights in the dataset, this route posts a 91.7% on-time rate with an average delay of 94.6 minutes when flights run late. Over the most recent 24 months of BTS data, 2,436 flights were recorded on this pairing — 21 cancelled (0.9%) and 0 diverted (0.0%). Those baseline metrics tell you what to expect before you book.

Having 8 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 7,786 total flights analyzed, the 91.7% on-time figure is statistically meaningful rather than a small-sample fluke. The 94.6-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, Nov 2024 posted the best performance on this corridor at 99% on-time, while Apr 2024 came in at 82% on-time — a 17-point gap between best and worst recent month. For travelers evaluating the ONT to SLC route, the combination of a 91.7% on-time rate, 94.6-minute average delay, 0.9% recent cancellation rate, and 8 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.