AA 712 then AA 1502 at Charlotte
St Louis → Charlotte → Nashville
Timetable, Charlotte time
10:13AA 712 from St Louis at the gate
23:13AA 1502 to Nashville leaves the gate
13 h apart on the timetable
AA 1502 leaves 13 h after AA 712 arrives on the timetable: more than half a day, so not a connection we count.