AA 5984 then AA 6445 at Charlotte
Florence → Charlotte → Knoxville
Timetable, Charlotte time
16:44AA 5984 from Florence at the gate
15:35AA 6445 to Knoxville leaves the gate
22 h 51 apart on the timetable, overnight
AA 6445 leaves 22 h 51 after AA 5984 arrives on the timetable: more than half a day, so not a connection we count.