DL 1147 then K4 538 at O'Hare
Atlanta → Chicago → Seoul
Timetable, Chicago time
10:25DL 1147 from Atlanta at the gate
01:45K4 538 to Seoul leaves the gate
15 h 20 apart on the timetable, overnight
K4 538 leaves 15 h 20 after DL 1147 arrives on the timetable: more than half a day, so not a connection we count.