Ontario to Oakland

What the Data Says About ONT to OAK

The Ontario to Oakland corridor (ONT → OAK) covers roughly 362 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 9,321 flights in the dataset, this route posts a 87.5% on-time rate with an average delay of 59.8 minutes when flights run late. Over the most recent 24 months of BTS data, 3,135 flights were recorded on this pairing — 15 cancelled (0.5%) and 2 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 1 carrier on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 9,321 total flights analyzed, the 87.5% on-time figure is statistically meaningful rather than a small-sample fluke. The 59.8-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 2024 posted the best performance on this corridor at 94% on-time, while May 2024 came in at 76% on-time — a 18-point gap between best and worst recent month. For travelers evaluating the ONT to OAK route, the combination of a 87.5% on-time rate, 59.8-minute average delay, 0.5% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.