AA 5819 then AA 1597 at Philadelphia
Harrisburg → Philadelphia → Charleston (South Carolina)
Timetable, Philadelphia time
20:03AA 5819 from Harrisburg at the gate
18:37AA 1597 to Charleston (South Carolina) leaves the gate
22 h 34 apart on the timetable, overnight
AA 1597 leaves 22 h 34 after AA 5819 arrives on the timetable: more than half a day, so not a connection we count.