Great Falls to Salt Lake City

What the Data Says About GTF to SLC

The Great Falls to Salt Lake City corridor (GTF → SLC) covers roughly 463 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 5,902 flights in the dataset, this route posts a 91.9% on-time rate with an average delay of 88.5 minutes when flights run late. Over the most recent 24 months of BTS data, 2,086 flights were recorded on this pairing — 5 cancelled (0.2%) and 1 diverted (0.0%). 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 5,902 total flights analyzed, the 91.9% on-time figure is statistically meaningful rather than a small-sample fluke. The 88.5-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, Jun 2025 posted the best performance on this corridor at 99% on-time, while Jan 2024 came in at 77% on-time — a 22-point gap between best and worst recent month. For travelers evaluating the GTF to SLC route, the combination of a 91.9% on-time rate, 88.5-minute average delay, 0.2% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.