AA 2224 then DL 5648 at Charlotte
Baltimore → Charlotte → Boston
Timetable, Charlotte time
08:49AA 2224 from Baltimore at the gate
06:40DL 5648 to Boston leaves the gate
21 h 51 apart on the timetable, overnight
DL 5648 leaves 21 h 51 after AA 2224 arrives on the timetable: more than half a day, so not a connection we count.