AA 3190 then K4 578 at O'Hare
New York LaGuardia → Chicago → Seoul
Timetable, Chicago time
10:00AA 3190 from New York LaGuardia at the gate
07:40K4 578 to Seoul leaves the gate
21 h 40 apart on the timetable, overnight
K4 578 leaves 21 h 40 after AA 3190 arrives on the timetable: more than half a day, so not a connection we count.