Chattanooga, TN

What the Data Says About CHA

Chattanooga, TN in Chattanooga, Tennessee handled 66,136 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 83.6% on-time departure rate. Of those flights, 10,835 experienced delays, 646 were cancelled, and 56 were diverted. The cancellation rate works out to 0.98%, the diversion rate to 0.08%, and the average delay when departures run late is 81.4 minutes. These figures are the baseline for comparing CHA against other airports in the same state and nationally.

Breaking down what drives delays at CHA, Carrier leads the pack. Carrier accounts for 40.4% of total delay minutes, followed by Late Aircraft at 37.1% and NAS (National Aviation System) at 14.5%. Weather contributes 7.9% 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, October runs the cleanest at CHA with a 94.2% on-time rate, while June is the roughest at 89.1% — a 5-point swing between best and worst month. Volume peaks in October, when average flights hit 996. The busiest route from CHA is to CHA (Chattanooga), with 13,429 flights at a 87.3% on-time rate. Combine these numbers — 83.6% on-time, 81.4-minute average delay, 0.98% cancellation rate — and you have a concrete picture of departure reliability at Chattanooga, TN.