Ontario to Sacramento

What the Data Says About ONT to SMF

The Ontario to Sacramento corridor (ONT → SMF) covers roughly 390 miles and is served by 3 carriers, based on Bureau of Transportation Statistics reporting. Across 10,949 flights in the dataset, this route posts a 87.7% on-time rate with an average delay of 56.6 minutes when flights run late. Over the most recent 24 months of BTS data, 4,012 flights were recorded on this pairing — 10 cancelled (0.2%) and 2 diverted (0.0%). Those baseline metrics tell you what to expect before you book.

Having 3 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 10,949 total flights analyzed, the 87.7% on-time figure is statistically meaningful rather than a small-sample fluke. The 56.6-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, Sep 2025 posted the best performance on this corridor at 93% on-time, while Jan 2024 came in at 81% on-time — a 12-point gap between best and worst recent month. For travelers evaluating the ONT to SMF route, the combination of a 87.7% on-time rate, 56.6-minute average delay, 0.2% recent cancellation rate, and 3 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.