AA 3865 then AA 3326 at Charlotte
Hilton Head → Charlotte → Austin
Timetable, Charlotte time
13:44AA 3865 from Hilton Head at the gate
12:10AA 3326 to Austin leaves the gate
22 h 26 apart on the timetable, overnight
AA 3326 leaves 22 h 26 after AA 3865 arrives on the timetable: more than half a day, so not a connection we count.