AA 3391 then DL 5630 at Charlotte
Hilton Head → Charlotte → Boston
Timetable, Charlotte time
17:40AA 3391 from Hilton Head at the gate
14:37DL 5630 to Boston leaves the gate
20 h 57 apart on the timetable, overnight
DL 5630 leaves 20 h 57 after AA 3391 arrives on the timetable: more than half a day, so not a connection we count.