UA 5633 then K4 538 at O'Hare
Fargo → Chicago → Seoul
Timetable, Chicago time
07:54UA 5633 from Fargo at the gate
01:45K4 538 to Seoul leaves the gate
17 h 51 apart on the timetable, overnight
K4 538 leaves 17 h 51 after UA 5633 arrives on the timetable: more than half a day, so not a connection we count.