AA 2688 then AA 5543 at Charlotte
Raleigh-Durham → Charlotte → Pittsburgh
Timetable, Charlotte time
14:00AA 2688 from Raleigh-Durham at the gate
08:35AA 5543 to Pittsburgh leaves the gate
18 h 35 apart on the timetable, overnight
AA 5543 leaves 18 h 35 after AA 2688 arrives on the timetable: more than half a day, so not a connection we count.