Aspen, CO

What the Data Says About ASE

Aspen, CO in Aspen, Colorado handled 78,805 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 73.5% on-time departure rate. Of those flights, 20,917 experienced delays, 3,058 were cancelled, and 197 were diverted. The cancellation rate works out to 3.88%, the diversion rate to 0.25%, and the average delay when departures run late is 97.1 minutes. These figures are the baseline for comparing ASE against other airports in the same state and nationally.

Breaking down what drives delays at ASE, Carrier leads the pack. Carrier accounts for 34.7% of total delay minutes, followed by Late Aircraft at 28.5% and Weather at 21.4%. Weather contributes 21.4% of delay minutes at this airport, while security holds the smallest share at 0.4%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.

Seasonally, November runs the cleanest at ASE with a 92.5% on-time rate, while December is the roughest at 82% — a 11-point swing between best and worst month. Volume peaks in March, when average flights hit 1,889. The busiest route from ASE is to ASE (Aspen), with 14,210 flights at a 74.9% on-time rate. Combine these numbers — 73.5% on-time, 97.1-minute average delay, 3.88% cancellation rate — and you have a concrete picture of departure reliability at Aspen, CO.