DL 5641 then DL 5837 at Boston
Cleveland → Boston → Charlotte
Timetable, Boston time
20:00DL 5641 from Cleveland at the gate
17:40DL 5837 to Charlotte leaves the gate
21 h 40 apart on the timetable, overnight
DL 5837 leaves 21 h 40 after DL 5641 arrives on the timetable: more than half a day, so not a connection we count.