AA 3987 then AA 5543 at Charlotte
Springfield → Charlotte → Pittsburgh
Timetable, Charlotte time
15:38AA 3987 from Springfield at the gate
08:35AA 5543 to Pittsburgh leaves the gate
16 h 57 apart on the timetable, overnight
AA 5543 leaves 16 h 57 after AA 3987 arrives on the timetable: more than half a day, so not a connection we count.