AA 2074 then DL 5620 at Boston
Chicago O'Hare → Boston → Cincinnati
Timetable, Boston time
17:08AA 2074 from Chicago O'Hare at the gate
17:00DL 5620 to Cincinnati leaves the gate
23 h 52 apart on the timetable, overnight
DL 5620 leaves 23 h 52 after AA 2074 arrives on the timetable: more than half a day, so not a connection we count.