Flagstaff, AZ

What the Data Says About FLG

Flagstaff, AZ in Flagstaff, Arizona handled 22,330 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 85.8% on-time departure rate. Of those flights, 3,161 experienced delays, 280 were cancelled, and 22 were diverted. The cancellation rate works out to 1.25%, the diversion rate to 0.10%, and the average delay when departures run late is 103.8 minutes. These figures are the baseline for comparing FLG against other airports in the same state and nationally.

Breaking down what drives delays at FLG, Carrier leads the pack. Carrier accounts for 55.4% of total delay minutes, followed by Late Aircraft at 26.5% and Weather at 11.9%. Weather contributes 11.9% 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 FLG with a 95.1% on-time rate, while October is the roughest at 91.9% — a 3-point swing between best and worst month. Volume peaks in October, when average flights hit 391. The busiest route from FLG is to FLG (Flagstaff), with 7,316 flights at a 86.9% on-time rate. Combine these numbers — 85.8% on-time, 103.8-minute average delay, 1.25% cancellation rate — and you have a concrete picture of departure reliability at Flagstaff, AZ.