Belleville, IL

What the Data Says About BLV

Belleville, IL in Belleville, Illinois handled 14,072 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 76.4% on-time departure rate. Of those flights, 3,319 experienced delays, 270 were cancelled, and 23 were diverted. The cancellation rate works out to 1.92%, the diversion rate to 0.16%, and the average delay when departures run late is 84.7 minutes. These figures are the baseline for comparing BLV against other airports in the same state and nationally.

Breaking down what drives delays at BLV, Late Aircraft leads the pack. Late Aircraft accounts for 51.8% of total delay minutes, followed by Carrier at 24.6% and NAS (National Aviation System) at 14.4%. Weather contributes 9.1% 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, September runs the cleanest at BLV with a 91.3% on-time rate, while July is the roughest at 83% — a 8-point swing between best and worst month. Volume peaks in July, when average flights hit 329. The busiest route from BLV is to VPS (Valparaiso), with 1,221 flights at a 74.2% on-time rate. Combine these numbers — 76.4% on-time, 84.7-minute average delay, 1.92% cancellation rate — and you have a concrete picture of departure reliability at Belleville, IL.