Dayton, OH

What the Data Says About DAY

Dayton, OH in Dayton, Ohio handled 87,827 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 84.2% on-time departure rate. Of those flights, 13,839 experienced delays, 896 were cancelled, and 103 were diverted. The cancellation rate works out to 1.02%, the diversion rate to 0.12%, and the average delay when departures run late is 86.4 minutes. These figures are the baseline for comparing DAY against other airports in the same state and nationally.

Breaking down what drives delays at DAY, Late Aircraft leads the pack. Late Aircraft accounts for 39.9% of total delay minutes, followed by Carrier at 34.6% and NAS (National Aviation System) at 19.9%. Weather contributes 5.6% 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, September runs the cleanest at DAY with a 95.2% on-time rate, while July is the roughest at 91.3% — a 4-point swing between best and worst month. Volume peaks in March, when average flights hit 1,314. The busiest route from DAY is to DAY (Dayton), with 8,375 flights at a 79.3% on-time rate. Combine these numbers — 84.2% on-time, 86.4-minute average delay, 1.02% cancellation rate — and you have a concrete picture of departure reliability at Dayton, OH.