AA 1204 then AA 2758 at Charlotte
Buffalo → Charlotte → Memphis
Timetable, Charlotte time
07:50AA 1204 from Buffalo at the gate
21:00AA 2758 to Memphis leaves the gate
13 h 10 apart on the timetable
AA 2758 leaves 13 h 10 after AA 1204 arrives on the timetable: more than half a day, so not a connection we count.