West Yellowstone to Salt Lake City

What the Data Says About WYS to SLC

The West Yellowstone to Salt Lake City corridor (WYS → SLC) covers roughly 273 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 1,229 flights in the dataset, this route posts a 90.2% on-time rate with an average delay of 139.4 minutes when flights run late. Over the most recent 24 months of BTS data, 1,138 flights were recorded on this pairing — 7 cancelled (0.6%) and 3 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 1 carrier on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 1,229 total flights analyzed, the 90.2% on-time figure is statistically meaningful rather than a small-sample fluke. The 139.4-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, Sep 2022 posted the best performance on this corridor at 96% on-time, while Jul 2024 came in at 79% on-time — a 17-point gap between best and worst recent month. For travelers evaluating the WYS to SLC route, the combination of a 90.2% on-time rate, 139.4-minute average delay, 0.6% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.