DL 5591 then K4 524 at O'Hare
New York JFK → Chicago → Seoul
Timetable, Chicago time
21:44DL 5591 from New York JFK at the gate
19:50K4 524 to Seoul leaves the gate
22 h 06 apart on the timetable, overnight
K4 524 leaves 22 h 06 after DL 5591 arrives on the timetable: more than half a day, so not a connection we count.