AA 1668 then GG 9723 at O'Hare
Dallas-Fort Worth → Chicago → Seoul
Timetable, Chicago time
23:15AA 1668 from Dallas-Fort Worth at the gate
23:00GG 9723 to Seoul leaves the gate
23 h 45 apart on the timetable, overnight
GG 9723 leaves 23 h 45 after AA 1668 arrives on the timetable: more than half a day, so not a connection we count.