AA 5984 then AA 6470 at Charlotte
Florence → Charlotte → Knoxville
Timetable, Charlotte time
16:44AA 5984 from Florence at the gate
16:20AA 6470 to Knoxville leaves the gate
23 h 36 apart on the timetable, overnight
AA 6470 leaves 23 h 36 after AA 5984 arrives on the timetable: more than half a day, so not a connection we count.