AA 3812 then K4 578 at O'Hare
White Plains → Chicago → Seoul
Timetable, Chicago time
13:59AA 3812 from White Plains at the gate
07:40K4 578 to Seoul leaves the gate
17 h 41 apart on the timetable, overnight
K4 578 leaves 17 h 41 after AA 3812 arrives on the timetable: more than half a day, so not a connection we count.