Iron Mountain/Kingsfd, MI

What the Data Says About IMT

Iron Mountain/Kingsfd, MI in Iron Mountain/Kingsfd, Michigan handled 8,658 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 84.9% on-time departure rate. Of those flights, 1,304 experienced delays, 66 were cancelled, and 7 were diverted. The cancellation rate works out to 0.76%, the diversion rate to 0.08%, and the average delay when departures run late is 110.2 minutes. These figures are the baseline for comparing IMT against other airports in the same state and nationally.

Breaking down what drives delays at IMT, Carrier leads the pack. Carrier accounts for 68.0% of total delay minutes, followed by Weather at 27.7% and NAS (National Aviation System) at 3.1%. Weather contributes 27.7% of delay minutes at this airport, while security holds the smallest share at 0.2%. 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 IMT with a 94.7% on-time rate, while December is the roughest at 86.8% — a 8-point swing between best and worst month. Volume peaks in October, when average flights hit 124. The busiest route from IMT is to MSP (Minneapolis), with 1,865 flights at a 84.7% on-time rate. Combine these numbers — 84.9% on-time, 110.2-minute average delay, 0.76% cancellation rate — and you have a concrete picture of departure reliability at Iron Mountain/Kingsfd, MI.