KE 37 then FX 9791 at O'Hare
Seoul → Chicago → Anchorage
Timetable, Chicago time
08:30KE 37 from Seoul at the gate
04:00FX 9791 to Anchorage leaves the gate
19 h 30 apart on the timetable, overnight
FX 9791 leaves 19 h 30 after KE 37 arrives on the timetable: more than half a day, so not a connection we count.