Idaho Falls to Salt Lake City

What the Data Says About IDA to SLC

The Idaho Falls to Salt Lake City corridor (IDA → SLC) covers roughly 188 miles and is served by 3 carriers, based on Bureau of Transportation Statistics reporting. Across 7,152 flights in the dataset, this route posts a 91.6% on-time rate with an average delay of 108.8 minutes when flights run late. Over the most recent 24 months of BTS data, 2,204 flights were recorded on this pairing — 5 cancelled (0.2%) and 0 diverted (0.0%). Those baseline metrics tell you what to expect before you book.

Having 3 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 7,152 total flights analyzed, the 91.6% on-time figure is statistically meaningful rather than a small-sample fluke. The 108.8-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, Nov 2025 posted the best performance on this corridor at 100% on-time, while Jan 2025 came in at 81% on-time — a 19-point gap between best and worst recent month. For travelers evaluating the IDA to SLC route, the combination of a 91.6% on-time rate, 108.8-minute average delay, 0.2% recent cancellation rate, and 3 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.