Juneau, AK

What the Data Says About JNU

Juneau, AK in Juneau, Alaska handled 52,533 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 85.3% on-time departure rate. Of those flights, 7,738 experienced delays, 558 were cancelled, and 163 were diverted. The cancellation rate works out to 1.06%, the diversion rate to 0.31%, and the average delay when departures run late is 62.7 minutes. These figures are the baseline for comparing JNU against other airports in the same state and nationally.

Breaking down what drives delays at JNU, Late Aircraft leads the pack. Late Aircraft accounts for 46.3% of total delay minutes, followed by Carrier at 29.8% and NAS (National Aviation System) at 17.2%. Weather contributes 6.5% 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, May runs the cleanest at JNU with a 95.3% on-time rate, while December is the roughest at 89.9% — a 5-point swing between best and worst month. Volume peaks in July, when average flights hit 948. The busiest route from JNU is to SEA (Seattle), with 8,737 flights at a 84% on-time rate. Combine these numbers — 85.3% on-time, 62.7-minute average delay, 1.06% cancellation rate — and you have a concrete picture of departure reliability at Juneau, AK.