AA 454 then AA 5483 at Philadelphia
Austin → Philadelphia → Pittsburgh
Timetable, Philadelphia time
17:17AA 454 from Austin at the gate
14:30AA 5483 to Pittsburgh leaves the gate
21 h 13 apart on the timetable, overnight
AA 5483 leaves 21 h 13 after AA 454 arrives on the timetable: more than half a day, so not a connection we count.