AA 3865 then AA 5310 at Charlotte
Hilton Head → Charlotte → Cincinnati
Timetable, Charlotte time
13:44AA 3865 from Hilton Head at the gate
12:52AA 5310 to Cincinnati leaves the gate
23 h 08 apart on the timetable, overnight
AA 5310 leaves 23 h 08 after AA 3865 arrives on the timetable: more than half a day, so not a connection we count.