CK 625 then K4 578 at O'Hare
Seattle (SEA) → Chicago → Seoul
Timetable, Chicago time
16:39CK 625 from Seattle (SEA) at the gate
07:40K4 578 to Seoul leaves the gate
15 h 01 apart on the timetable, overnight
K4 578 leaves 15 h 01 after CK 625 arrives on the timetable: more than half a day, so not a connection we count.