Denver to Gillette

What the Data Says About DEN to GCC

The Denver to Gillette corridor (DEN → GCC) covers roughly 313 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 3,944 flights in the dataset, this route posts a 84.6% on-time rate with an average delay of 87.4 minutes when flights run late. Over the most recent 24 months of BTS data, 1,462 flights were recorded on this pairing — 24 cancelled (1.6%) 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 3,944 total flights analyzed, the 84.6% on-time figure is statistically meaningful rather than a small-sample fluke. The 87.4-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, Dec 2024 posted the best performance on this corridor at 95% on-time, while Aug 2025 came in at 66% on-time — a 29-point gap between best and worst recent month. For travelers evaluating the DEN to GCC route, the combination of a 84.6% on-time rate, 87.4-minute average delay, 1.6% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.