CV 21 then K4 524 at O'Hare
Anchorage → Chicago → Seoul
Timetable, Chicago time
22:27CV 21 from Anchorage at the gate
19:50K4 524 to Seoul leaves the gate
21 h 23 apart on the timetable, overnight
K4 524 leaves 21 h 23 after CV 21 arrives on the timetable: more than half a day, so not a connection we count.