Mammoth Lakes, CA

What the Data Says About MMH

Mammoth Lakes, CA in Mammoth Lakes, California handled 540 flights in the Bureau of Transportation Statistics dataset between 2020 and 2020, posting a 80.7% on-time departure rate. Of those flights, 104 experienced delays, 71 were cancelled, and 0 were diverted. The cancellation rate works out to 13.15%, the diversion rate to 0.00%, and the average delay when departures run late is 90.5 minutes. These figures are the baseline for comparing MMH against other airports in the same state and nationally.

Breaking down what drives delays at MMH, Carrier leads the pack. Carrier accounts for 30.4% of total delay minutes, followed by Late Aircraft at 29.5% and Weather at 25.8%. Weather contributes 25.8% 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, March runs the cleanest at MMH with a 92.8% on-time rate, while February is the roughest at 83.3% — a 10-point swing between best and worst month. Volume peaks in January, when average flights hit 186. Combine these numbers — 80.7% on-time, 90.5-minute average delay, 13.15% cancellation rate — and you have a concrete picture of departure reliability at Mammoth Lakes, CA.