AA 1918 then GG 9723 at O'Hare
Miami → Chicago → Seoul
Timetable, Chicago time
23:56AA 1918 from Miami at the gate
23:00GG 9723 to Seoul leaves the gate
23 h 04 apart on the timetable, overnight
GG 9723 leaves 23 h 04 after AA 1918 arrives on the timetable: more than half a day, so not a connection we count.