San Diego to San Jose

What the Data Says About SAN to SJC

The San Diego to San Jose corridor (SAN → SJC) covers roughly 417 miles and is served by 21 carriers, based on Bureau of Transportation Statistics reporting. Across 31,496 flights in the dataset, this route posts a 82% on-time rate with an average delay of 55.7 minutes when flights run late. Over the most recent 24 months of BTS data, 10,996 flights were recorded on this pairing — 93 cancelled (0.8%) and 3 diverted (0.0%). Those baseline metrics tell you what to expect before you book.

Having 21 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 31,496 total flights analyzed, the 82% on-time figure is statistically meaningful rather than a small-sample fluke. The 55.7-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, Jan 2025 posted the best performance on this corridor at 86% on-time, while Oct 2024 came in at 68% on-time — a 18-point gap between best and worst recent month. For travelers evaluating the SAN to SJC route, the combination of a 82% on-time rate, 55.7-minute average delay, 0.8% recent cancellation rate, and 21 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.