AM 90 then MU 2040 at Incheon
Monterrey → Seoul → Qingdao
Timetable, Seoul time
14:15AM 90 from Monterrey at the gate
12:00MU 2040 to Qingdao leaves the gate
21 h 45 apart on the timetable, overnight
MU 2040 leaves 21 h 45 after AM 90 arrives on the timetable: more than half a day, so not a connection we count.