DL 5591 then K4 532 at O'Hare
New York JFK → Chicago → Seoul
Timetable, Chicago time
21:44DL 5591 from New York JFK at the gate
12:15K4 532 to Seoul leaves the gate
14 h 31 apart on the timetable, overnight
K4 532 leaves 14 h 31 after DL 5591 arrives on the timetable: more than half a day, so not a connection we count.