Sacramento to San Diego

What the Data Says About SMF to SAN

The Sacramento to San Diego corridor (SMF → SAN) covers roughly 480 miles and is served by 16 carriers, based on Bureau of Transportation Statistics reporting. Across 30,193 flights in the dataset, this route posts a 81.7% on-time rate with an average delay of 57.6 minutes when flights run late. Over the most recent 24 months of BTS data, 10,543 flights were recorded on this pairing — 97 cancelled (0.9%) and 26 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 16 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 30,193 total flights analyzed, the 81.7% on-time figure is statistically meaningful rather than a small-sample fluke. The 57.6-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, Jan 2025 posted the best performance on this corridor at 86% on-time, while Dec 2025 came in at 67% on-time — a 19-point gap between best and worst recent month. For travelers evaluating the SMF to SAN route, the combination of a 81.7% on-time rate, 57.6-minute average delay, 0.9% recent cancellation rate, and 16 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.