AA 5220 then DL 5630 at Charlotte
Washington → Charlotte → Boston
Timetable, Charlotte time
14:57AA 5220 from Washington at the gate
14:37DL 5630 to Boston leaves the gate
23 h 40 apart on the timetable, overnight
DL 5630 leaves 23 h 40 after AA 5220 arrives on the timetable: more than half a day, so not a connection we count.