AA 5278 then AA 2758 at Charlotte
Lexington → Charlotte → Memphis
Timetable, Charlotte time
07:56AA 5278 from Lexington at the gate
21:00AA 2758 to Memphis leaves the gate
13 h 04 apart on the timetable
AA 2758 leaves 13 h 04 after AA 5278 arrives on the timetable: more than half a day, so not a connection we count.