Salt Lake City to Ontario

What the Data Says About SLC to ONT

The Salt Lake City to Ontario corridor (SLC → ONT) covers roughly 558 miles and is served by 8 carriers, based on Bureau of Transportation Statistics reporting. Across 7,788 flights in the dataset, this route posts a 89.4% on-time rate with an average delay of 66.3 minutes when flights run late. Over the most recent 24 months of BTS data, 2,436 flights were recorded on this pairing — 17 cancelled (0.7%) and 2 diverted (0.1%). 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 7,788 total flights analyzed, the 89.4% on-time figure is statistically meaningful rather than a small-sample fluke. The 66.3-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 95% on-time, while Sep 2024 came in at 80% on-time — a 15-point gap between best and worst recent month. For travelers evaluating the SLC to ONT route, the combination of a 89.4% on-time rate, 66.3-minute average delay, 0.7% recent cancellation rate, and 8 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.