AA 5389 then AA 5543 at Charlotte
South Bend → Charlotte → Pittsburgh
Timetable, Charlotte time
13:10AA 5389 from South Bend at the gate
08:35AA 5543 to Pittsburgh leaves the gate
19 h 25 apart on the timetable, overnight
AA 5543 leaves 19 h 25 after AA 5389 arrives on the timetable: more than half a day, so not a connection we count.