Sioux City, IA

What the Data Says About SUX

Sioux City, IA in Sioux City, Iowa handled 9,052 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 81.8% on-time departure rate. Of those flights, 1,644 experienced delays, 125 were cancelled, and 19 were diverted. The cancellation rate works out to 1.38%, the diversion rate to 0.21%, and the average delay when departures run late is 100.9 minutes. These figures are the baseline for comparing SUX against other airports in the same state and nationally.

Breaking down what drives delays at SUX, Carrier leads the pack. Carrier accounts for 49.8% of total delay minutes, followed by Late Aircraft at 24.2% and NAS (National Aviation System) at 14.2%. Weather contributes 11.7% of delay minutes at this airport, while security holds the smallest share at 0.0%. 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 SUX with a 95.2% on-time rate, while June is the roughest at 86.9% — a 8-point swing between best and worst month. Volume peaks in July, when average flights hit 140. The busiest route from SUX is to SUX (Sioux City), with 2,124 flights at a 78.6% on-time rate. Combine these numbers — 81.8% on-time, 100.9-minute average delay, 1.38% cancellation rate — and you have a concrete picture of departure reliability at Sioux City, IA.