AA 2418 then K4 578 at O'Hare
Indianapolis → Chicago → Seoul
Timetable, Chicago time
13:30AA 2418 from Indianapolis at the gate
07:40K4 578 to Seoul leaves the gate
18 h 10 apart on the timetable, overnight
K4 578 leaves 18 h 10 after AA 2418 arrives on the timetable: more than half a day, so not a connection we count.