UA 2771 then K4 532 at O'Hare
Charlotte → Chicago → Seoul
Timetable, Chicago time
09:35UA 2771 from Charlotte at the gate
06:30K4 532 to Seoul leaves the gate
20 h 55 apart on the timetable, overnight
K4 532 leaves 20 h 55 after UA 2771 arrives on the timetable: more than half a day, so not a connection we count.