Boise to San Francisco

What the Data Says About BOI to SFO

The Boise to San Francisco corridor (BOI → SFO) covers roughly 522 miles and is served by 5 carriers, based on Bureau of Transportation Statistics reporting. Across 9,544 flights in the dataset, this route posts a 83.7% on-time rate with an average delay of 85.2 minutes when flights run late. Over the most recent 24 months of BTS data, 3,009 flights were recorded on this pairing — 14 cancelled (0.5%) and 15 diverted (0.5%). Those baseline metrics tell you what to expect before you book.

Having 5 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 9,544 total flights analyzed, the 83.7% on-time figure is statistically meaningful rather than a small-sample fluke. The 85.2-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 91% on-time, while May 2024 came in at 61% on-time — a 30-point gap between best and worst recent month. For travelers evaluating the BOI to SFO route, the combination of a 83.7% on-time rate, 85.2-minute average delay, 0.5% recent cancellation rate, and 5 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.