Hilton Head, SC

What the Data Says About HHH

Hilton Head, SC in Hilton Head, South Carolina handled 27,234 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 83.5% on-time departure rate. Of those flights, 4,499 experienced delays, 362 were cancelled, and 97 were diverted. The cancellation rate works out to 1.33%, the diversion rate to 0.36%, and the average delay when departures run late is 78.7 minutes. These figures are the baseline for comparing HHH against other airports in the same state and nationally.

Breaking down what drives delays at HHH, Late Aircraft leads the pack. Late Aircraft accounts for 41.7% of total delay minutes, followed by Carrier at 30.9% and NAS (National Aviation System) at 19.3%. Weather contributes 7.8% of delay minutes at this airport, while security holds the smallest share at 0.2%. 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 HHH with a 94.2% on-time rate, while July is the roughest at 86.8% — a 7-point swing between best and worst month. Volume peaks in July, when average flights hit 576. The busiest route from HHH is to HHH (Hilton Head), with 6,270 flights at a 83.7% on-time rate. Combine these numbers — 83.5% on-time, 78.7-minute average delay, 1.33% cancellation rate — and you have a concrete picture of departure reliability at Hilton Head, SC.