AA 549 then AA 1586 at Charlotte
Richmond → Charlotte → Charleston (South Carolina)
Timetable, Charlotte time
06:18AA 549 from Richmond at the gate
18:31AA 1586 to Charleston (South Carolina) leaves the gate
12 h 13 apart on the timetable
AA 1586 leaves 12 h 13 after AA 549 arrives on the timetable: more than half a day, so not a connection we count.