DL 5731 then DL 5620 at Boston
Pittsburgh → Boston → Cincinnati
Timetable, Boston time
18:44DL 5731 from Pittsburgh at the gate
18:05DL 5620 to Cincinnati leaves the gate
23 h 21 apart on the timetable, overnight
DL 5620 leaves 23 h 21 after DL 5731 arrives on the timetable: more than half a day, so not a connection we count.