Eau Claire, WI

What the Data Says About EAU

Eau Claire, WI in Eau Claire, Wisconsin handled 5,152 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 84.5% on-time departure rate. Of those flights, 796 experienced delays, 90 were cancelled, and 3 were diverted. The cancellation rate works out to 1.75%, the diversion rate to 0.06%, and the average delay when departures run late is 108.9 minutes. These figures are the baseline for comparing EAU against other airports in the same state and nationally.

Breaking down what drives delays at EAU, Carrier leads the pack. Carrier accounts for 42.7% of total delay minutes, followed by Late Aircraft at 35.4% and NAS (National Aviation System) at 12.2%. Weather contributes 9.5% 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, April runs the cleanest at EAU with a 96.2% on-time rate, while December is the roughest at 90.8% — a 5-point swing between best and worst month. Volume peaks in January, when average flights hit 120. The busiest route from EAU is to ORD (Chicago), with 2,546 flights at a 85.9% on-time rate. Combine these numbers — 84.5% on-time, 108.9-minute average delay, 1.75% cancellation rate — and you have a concrete picture of departure reliability at Eau Claire, WI.