AM 90 then ZE 891 at Incheon
Monterrey → Seoul → Xiamen
Timetable, Seoul time
14:15AM 90 from Monterrey at the gate
09:30ZE 891 to Xiamen leaves the gate
19 h 15 apart on the timetable, overnight
ZE 891 leaves 19 h 15 after AM 90 arrives on the timetable: more than half a day, so not a connection we count.