AA 1831 then DL 5630 at Charlotte
Key West → Charlotte → Boston
Timetable, Charlotte time
15:39AA 1831 from Key West at the gate
14:37DL 5630 to Boston leaves the gate
22 h 58 apart on the timetable, overnight
DL 5630 leaves 22 h 58 after AA 1831 arrives on the timetable: more than half a day, so not a connection we count.