AA 5984 then AA 400 at Charlotte
Florence → Charlotte → Miami
Timetable, Charlotte time
16:44AA 5984 from Florence at the gate
16:42AA 400 to Miami leaves the gate
23 h 58 apart on the timetable, overnight
AA 400 leaves 23 h 58 after AA 5984 arrives on the timetable: more than half a day, so not a connection we count.