Gillette, WY

What the Data Says About GCC

Gillette, WY in Gillette, Wyoming handled 8,123 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 86% on-time departure rate. Of those flights, 1,136 experienced delays, 105 were cancelled, and 15 were diverted. The cancellation rate works out to 1.29%, the diversion rate to 0.18%, and the average delay when departures run late is 122.0 minutes. These figures are the baseline for comparing GCC against other airports in the same state and nationally.

Breaking down what drives delays at GCC, Carrier leads the pack. Carrier accounts for 54.7% of total delay minutes, followed by Late Aircraft at 21.1% and NAS (National Aviation System) at 14.2%. Weather contributes 9.9% of delay minutes at this airport, while security holds the smallest share at 0.0%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.

Seasonally, September runs the cleanest at GCC with a 96.7% on-time rate, while February is the roughest at 91.6% — a 5-point swing between best and worst month. Volume peaks in October, when average flights hit 123. The busiest route from GCC is to GCC (Gillette), with 3,944 flights at a 84.6% on-time rate. Combine these numbers — 86% on-time, 122.0-minute average delay, 1.29% cancellation rate — and you have a concrete picture of departure reliability at Gillette, WY.