AA 5984 then AA 6120 at Charlotte
Florence → Charlotte → Harrisburg
Timetable, Charlotte time
16:51AA 5984 from Florence at the gate
16:50AA 6120 to Harrisburg leaves the gate
23 h 59 apart on the timetable, overnight
AA 6120 leaves 23 h 59 after AA 5984 arrives on the timetable: more than half a day, so not a connection we count.