UA 2230 then K4 532 at O'Hare
Miami → Chicago → Seoul
Timetable, Chicago time
09:30UA 2230 from Miami at the gate
06:30K4 532 to Seoul leaves the gate
21 h apart on the timetable, overnight
K4 532 leaves 21 h after UA 2230 arrives on the timetable: more than half a day, so not a connection we count.