UA 474 then K4 221 at O'Hare
Mexico City → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
19:34UA 474 from Mexico City at the gate
16:20K4 221 to Cincinnati Northern Kentucky leaves the gate
20 h 46 apart on the timetable, overnight
K4 221 leaves 20 h 46 after UA 474 arrives on the timetable: more than half a day, so not a connection we count.