AA 518 then AA 5543 at Charlotte
Fort Lauderdale → Charlotte → Pittsburgh
Timetable, Charlotte time
14:05AA 518 from Fort Lauderdale at the gate
08:35AA 5543 to Pittsburgh leaves the gate
18 h 30 apart on the timetable, overnight
AA 5543 leaves 18 h 30 after AA 518 arrives on the timetable: more than half a day, so not a connection we count.