UA 5603 then K4 538 at O'Hare
Kansas City → Chicago → Seoul
Timetable, Chicago time
11:42UA 5603 from Kansas City at the gate
01:45K4 538 to Seoul leaves the gate
14 h 03 apart on the timetable, overnight
K4 538 leaves 14 h 03 after UA 5603 arrives on the timetable: more than half a day, so not a connection we count.