UA 5823 then K4 538 at O'Hare
Oklahoma City → Chicago → Seoul
Timetable, Chicago time
12:29UA 5823 from Oklahoma City at the gate
01:45K4 538 to Seoul leaves the gate
13 h 16 apart on the timetable, overnight
K4 538 leaves 13 h 16 after UA 5823 arrives on the timetable: more than half a day, so not a connection we count.