Grand Junction, CO

What the Data Says About GJT

Grand Junction, CO in Grand Junction, Colorado handled 47,063 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 85.1% on-time departure rate. Of those flights, 6,989 experienced delays, 448 were cancelled, and 57 were diverted. The cancellation rate works out to 0.95%, the diversion rate to 0.12%, and the average delay when departures run late is 87.0 minutes. These figures are the baseline for comparing GJT against other airports in the same state and nationally.

Breaking down what drives delays at GJT, Carrier leads the pack. Carrier accounts for 47.6% of total delay minutes, followed by Late Aircraft at 26.2% and NAS (National Aviation System) at 17.5%. Weather contributes 8.6% 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 GJT with a 94.3% on-time rate, while June is the roughest at 91.1% — a 3-point swing between best and worst month. Volume peaks in October, when average flights hit 732. The busiest route from GJT is to GJT (Grand Junction), with 8,516 flights at a 80.4% on-time rate. Combine these numbers — 85.1% on-time, 87.0-minute average delay, 0.95% cancellation rate — and you have a concrete picture of departure reliability at Grand Junction, CO.