DL 5653 then DL 5620 at Boston
Columbus (Ohio) → Boston → Cincinnati
Timetable, Boston time
19:42DL 5653 from Columbus (Ohio) at the gate
17:00DL 5620 to Cincinnati leaves the gate
21 h 18 apart on the timetable, overnight
DL 5620 leaves 21 h 18 after DL 5653 arrives on the timetable: more than half a day, so not a connection we count.