DL 5641 then DL 5620 at Boston
Cleveland → Boston → Cincinnati
Timetable, Boston time
19:35DL 5641 from Cleveland at the gate
17:00DL 5620 to Cincinnati leaves the gate
21 h 25 apart on the timetable, overnight
DL 5620 leaves 21 h 25 after DL 5641 arrives on the timetable: more than half a day, so not a connection we count.