AA 1831 then AA 5335 at Charlotte
Key West → Charlotte → South Bend
Timetable, Charlotte time
16:14AA 1831 from Key West at the gate
15:48AA 5335 to South Bend leaves the gate
23 h 34 apart on the timetable, overnight
AA 5335 leaves 23 h 34 after AA 1831 arrives on the timetable: more than half a day, so not a connection we count.