AA 6113 then AA 5543 at Charlotte
Knoxville → Charlotte → Pittsburgh
Timetable, Charlotte time
15:33AA 6113 from Knoxville at the gate
08:35AA 5543 to Pittsburgh leaves the gate
17 h 02 apart on the timetable, overnight
AA 5543 leaves 17 h 02 after AA 6113 arrives on the timetable: more than half a day, so not a connection we count.