AM 90 then MU 854 at Incheon
Monterrey → Seoul → Xi'an
Timetable, Seoul time
06:10AM 90 from Monterrey at the gate
19:55MU 854 to Xi'an leaves the gate
13 h 45 apart on the timetable
MU 854 leaves 13 h 45 after AM 90 arrives on the timetable: more than half a day, so not a connection we count.