UA 2389 then K4 532 at O'Hare
New York LaGuardia → Chicago → Seoul
Timetable, Chicago time
07:51UA 2389 from New York LaGuardia at the gate
06:30K4 532 to Seoul leaves the gate
22 h 39 apart on the timetable, overnight
K4 532 leaves 22 h 39 after UA 2389 arrives on the timetable: more than half a day, so not a connection we count.