Stockton, CA

What the Data Says About SCK

Stockton, CA in Stockton, California handled 7,206 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 72.6% on-time departure rate. Of those flights, 1,975 experienced delays, 167 were cancelled, and 3 were diverted. The cancellation rate works out to 2.32%, the diversion rate to 0.04%, and the average delay when departures run late is 78.7 minutes. These figures are the baseline for comparing SCK against other airports in the same state and nationally.

Breaking down what drives delays at SCK, Late Aircraft leads the pack. Late Aircraft accounts for 46.2% of total delay minutes, followed by Carrier at 26.4% and NAS (National Aviation System) at 15.9%. Weather contributes 10.1% of delay minutes at this airport, while security holds the smallest share at 1.4%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.

Seasonally, February runs the cleanest at SCK with a 89.6% on-time rate, while June is the roughest at 79.7% — a 10-point swing between best and worst month. Volume peaks in March, when average flights hit 124. The busiest route from SCK is to LAS (Las Vegas), with 2,383 flights at a 63.2% on-time rate. Combine these numbers — 72.6% on-time, 78.7-minute average delay, 2.32% cancellation rate — and you have a concrete picture of departure reliability at Stockton, CA.