Gillette to Denver

What the Data Says About GCC to DEN

The Gillette to Denver corridor (GCC → DEN) covers roughly 313 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 3,914 flights in the dataset, this route posts a 84.8% on-time rate with an average delay of 146.1 minutes when flights run late. Over the most recent 24 months of BTS data, 1,462 flights were recorded on this pairing — 23 cancelled (1.6%) and 8 diverted (0.5%). 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 3,914 total flights analyzed, the 84.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 146.1-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 2024 posted the best performance on this corridor at 93% on-time, while Apr 2025 came in at 65% on-time — a 28-point gap between best and worst recent month. For travelers evaluating the GCC to DEN route, the combination of a 84.8% on-time rate, 146.1-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.