Salt Lake City to Helena

What the Data Says About SLC to HLN

The Salt Lake City to Helena corridor (SLC → HLN) covers roughly 402 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 4,470 flights in the dataset, this route posts a 94.2% on-time rate with an average delay of 84.2 minutes when flights run late. Over the most recent 24 months of BTS data, 1,459 flights were recorded on this pairing — 5 cancelled (0.3%) and 3 diverted (0.2%). 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 4,470 total flights analyzed, the 94.2% on-time figure is statistically meaningful rather than a small-sample fluke. The 84.2-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, Dec 2025 posted the best performance on this corridor at 100% on-time, while Jan 2024 came in at 82% on-time — a 18-point gap between best and worst recent month. For travelers evaluating the SLC to HLN route, the combination of a 94.2% on-time rate, 84.2-minute average delay, 0.3% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.