AA 418 then AA 2758 at Charlotte
Boston → Charlotte → Memphis
Timetable, Charlotte time
08:25AA 418 from Boston at the gate
21:00AA 2758 to Memphis leaves the gate
12 h 35 apart on the timetable
AA 2758 leaves 12 h 35 after AA 418 arrives on the timetable: more than half a day, so not a connection we count.