Y4 702 then K4 708 at O'Hare
Mexico City → Chicago → Seoul
Timetable, Chicago time
22:13Y4 702 from Mexico City at the gate
11:25K4 708 to Seoul leaves the gate
13 h 12 apart on the timetable, overnight
K4 708 leaves 13 h 12 after Y4 702 arrives on the timetable: more than half a day, so not a connection we count.