AM 90 then KE 1403 at Incheon
Monterrey → Seoul → Busan
Timetable, Seoul time
14:15AM 90 from Monterrey at the gate
09:40KE 1403 to Busan leaves the gate
19 h 25 apart on the timetable, overnight
KE 1403 leaves 19 h 25 after AM 90 arrives on the timetable: more than half a day, so not a connection we count.