Denver to Great Falls

What the Data Says About DEN to GTF

The Denver to Great Falls corridor (DEN → GTF) covers roughly 623 miles and is served by 4 carriers, based on Bureau of Transportation Statistics reporting. Across 4,494 flights in the dataset, this route posts a 82% on-time rate with an average delay of 75.6 minutes when flights run late. Over the most recent 24 months of BTS data, 1,460 flights were recorded on this pairing — 14 cancelled (1.0%) and 3 diverted (0.2%). 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 4,494 total flights analyzed, the 82% on-time figure is statistically meaningful rather than a small-sample fluke. The 75.6-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 2024 posted the best performance on this corridor at 98% on-time, while Jul 2025 came in at 58% on-time — a 40-point gap between best and worst recent month. For travelers evaluating the DEN to GTF route, the combination of a 82% on-time rate, 75.6-minute average delay, 1.0% recent cancellation rate, and 4 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.