Hilo, HI

What the Data Says About ITO

Hilo, HI in Hilo, Hawaii handled 72,372 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 88.2% on-time departure rate. Of those flights, 8,539 experienced delays, 538 were cancelled, and 15 were diverted. The cancellation rate works out to 0.74%, the diversion rate to 0.02%, and the average delay when departures run late is 53.6 minutes. These figures are the baseline for comparing ITO against other airports in the same state and nationally.

Breaking down what drives delays at ITO, Late Aircraft leads the pack. Late Aircraft accounts for 64.1% of total delay minutes, followed by Carrier at 25.5% and NAS (National Aviation System) at 7.3%. Weather contributes 2.3% of delay minutes at this airport, while security holds the smallest share at 0.9%. 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 ITO with a 97.3% on-time rate, while December is the roughest at 91.9% — a 5-point swing between best and worst month. Volume peaks in July, when average flights hit 1,081. The busiest route from ITO is to HNL (Honolulu), with 33,567 flights at a 88.1% on-time rate. Combine these numbers — 88.2% on-time, 53.6-minute average delay, 0.74% cancellation rate — and you have a concrete picture of departure reliability at Hilo, HI.