AM 90 then MU 5052 at Incheon
Monterrey → Seoul → Shanghai
Timetable, Seoul time
14:15AM 90 from Monterrey at the gate
08:55MU 5052 to Shanghai leaves the gate
18 h 40 apart on the timetable, overnight
MU 5052 leaves 18 h 40 after AM 90 arrives on the timetable: more than half a day, so not a connection we count.