AA 5370 then AA 5543 at Charlotte
Nashville → Charlotte → Pittsburgh
Timetable, Charlotte time
12:52AA 5370 from Nashville at the gate
08:35AA 5543 to Pittsburgh leaves the gate
19 h 43 apart on the timetable, overnight
AA 5543 leaves 19 h 43 after AA 5370 arrives on the timetable: more than half a day, so not a connection we count.