AA 2764 then AA 1597 at Philadelphia
Boston → Philadelphia → Charleston (South Carolina)
Timetable, Philadelphia time
09:48AA 2764 from Boston at the gate
21:49AA 1597 to Charleston (South Carolina) leaves the gate
12 h 01 apart on the timetable
AA 1597 leaves 12 h 01 after AA 2764 arrives on the timetable: more than half a day, so not a connection we count.