AA 3391 then AA 5677 at Charlotte
Hilton Head → Charlotte → Cincinnati
Timetable, Charlotte time
17:40AA 3391 from Hilton Head at the gate
16:02AA 5677 to Cincinnati leaves the gate
22 h 22 apart on the timetable, overnight
AA 5677 leaves 22 h 22 after AA 3391 arrives on the timetable: more than half a day, so not a connection we count.