UA 415 then K4 221 at O'Hare
Milan → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
18:15UA 415 from Milan at the gate
16:20K4 221 to Cincinnati Northern Kentucky leaves the gate
22 h 05 apart on the timetable, overnight
K4 221 leaves 22 h 05 after UA 415 arrives on the timetable: more than half a day, so not a connection we count.