Montrose/Delta, CO

What the Data Says About MTJ

Montrose/Delta, CO in Montrose/Delta, Colorado handled 32,233 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 81.3% on-time departure rate. Of those flights, 6,020 experienced delays, 428 were cancelled, and 67 were diverted. The cancellation rate works out to 1.33%, the diversion rate to 0.21%, and the average delay when departures run late is 78.9 minutes. These figures are the baseline for comparing MTJ against other airports in the same state and nationally.

Breaking down what drives delays at MTJ, Late Aircraft leads the pack. Late Aircraft accounts for 40.6% of total delay minutes, followed by Carrier at 35.1% and NAS (National Aviation System) at 19.6%. Weather contributes 4.5% 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, April runs the cleanest at MTJ with a 94.4% on-time rate, while June is the roughest at 88.4% — a 6-point swing between best and worst month. Volume peaks in March, when average flights hit 756. The busiest route from MTJ is to DEN (Denver), with 8,502 flights at a 79.8% on-time rate. Combine these numbers — 81.3% on-time, 78.9-minute average delay, 1.33% cancellation rate — and you have a concrete picture of departure reliability at Montrose/Delta, CO.