AA 5988 then AA 5543 at Charlotte
Roanoke → Charlotte → Pittsburgh
Timetable, Charlotte time
13:42AA 5988 from Roanoke at the gate
08:35AA 5543 to Pittsburgh leaves the gate
18 h 53 apart on the timetable, overnight
AA 5543 leaves 18 h 53 after AA 5988 arrives on the timetable: more than half a day, so not a connection we count.