AA 6579 then AA 5483 at Philadelphia
Allentown → Philadelphia → Pittsburgh
Timetable, Philadelphia time
17:55AA 6579 from Allentown at the gate
14:30AA 5483 to Pittsburgh leaves the gate
20 h 35 apart on the timetable, overnight
AA 5483 leaves 20 h 35 after AA 6579 arrives on the timetable: more than half a day, so not a connection we count.