AA 6215 then K4 578 at O'Hare
Kansas City → Chicago → Seoul
Timetable, Chicago time
09:05AA 6215 from Kansas City at the gate
07:40K4 578 to Seoul leaves the gate
22 h 35 apart on the timetable, overnight
K4 578 leaves 22 h 35 after AA 6215 arrives on the timetable: more than half a day, so not a connection we count.