AA 588 then AA 5543 at Charlotte
Phoenix → Charlotte → Pittsburgh
Timetable, Charlotte time
15:45AA 588 from Phoenix at the gate
08:30AA 5543 to Pittsburgh leaves the gate
16 h 45 apart on the timetable, overnight
AA 5543 leaves 16 h 45 after AA 588 arrives on the timetable: more than half a day, so not a connection we count.