AA 2040 then DL 5630 at Charlotte
Washington National → Charlotte → Boston
Timetable, Charlotte time
16:56AA 2040 from Washington National at the gate
14:37DL 5630 to Boston leaves the gate
21 h 41 apart on the timetable, overnight
DL 5630 leaves 21 h 41 after AA 2040 arrives on the timetable: more than half a day, so not a connection we count.