AA 6128 then AA 5553 at Charlotte
Knoxville → Charlotte → Allentown
Timetable, Charlotte time
10:21AA 6128 from Knoxville at the gate
22:30AA 5553 to Allentown leaves the gate
12 h 09 apart on the timetable
AA 5553 leaves 12 h 09 after AA 6128 arrives on the timetable: more than half a day, so not a connection we count.