Sun Valley/Hailey/Ketchum, ID

What the Data Says About SUN

Sun Valley/Hailey/Ketchum, ID in Sun Valley/Hailey/Ketchum, Idaho handled 22,928 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 88.6% on-time departure rate. Of those flights, 2,622 experienced delays, 328 were cancelled, and 39 were diverted. The cancellation rate works out to 1.43%, the diversion rate to 0.17%, and the average delay when departures run late is 95.5 minutes. These figures are the baseline for comparing SUN against other airports in the same state and nationally.

Breaking down what drives delays at SUN, Carrier leads the pack. Carrier accounts for 45.0% of total delay minutes, followed by Weather at 24.1% and Late Aircraft at 15.6%. Weather contributes 24.1% of delay minutes at this airport, while security holds the smallest share at 0.1%. 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 SUN with a 97.7% on-time rate, while December is the roughest at 90.4% — a 7-point swing between best and worst month. Volume peaks in January, when average flights hit 456. The busiest route from SUN is to SLC (Salt Lake City), with 5,319 flights at a 91.7% on-time rate. Combine these numbers — 88.6% on-time, 95.5-minute average delay, 1.43% cancellation rate — and you have a concrete picture of departure reliability at Sun Valley/Hailey/Ketchum, ID.