Salt Lake City to Boise

What the Data Says About SLC to BOI

The Salt Lake City to Boise corridor (SLC → BOI) covers roughly 290 miles and is served by 4 carriers, based on Bureau of Transportation Statistics reporting. Across 10,115 flights in the dataset, this route posts a 88% on-time rate with an average delay of 68.2 minutes when flights run late. Over the most recent 24 months of BTS data, 3,386 flights were recorded on this pairing — 19 cancelled (0.6%) and 1 diverted (0.0%). Those baseline metrics tell you what to expect before you book.

Having 4 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 10,115 total flights analyzed, the 88% on-time figure is statistically meaningful rather than a small-sample fluke. The 68.2-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, Feb 2024 posted the best performance on this corridor at 94% on-time, while Jan 2024 came in at 71% on-time — a 23-point gap between best and worst recent month. For travelers evaluating the SLC to BOI route, the combination of a 88% on-time rate, 68.2-minute average delay, 0.6% recent cancellation rate, and 4 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.