DL 2646 then 2I 188 at Boston
Chicago O'Hare → Boston → Cincinnati
Timetable, Boston time
23:08DL 2646 from Chicago O'Hare at the gate
21:552I 188 to Cincinnati leaves the gate
22 h 47 apart on the timetable, overnight
2I 188 leaves 22 h 47 after DL 2646 arrives on the timetable: more than half a day, so not a connection we count.