ZE 512 then M0 602 at Incheon
Bangkok → Seoul → Ulaanbaatar
Timetable, Seoul time
06:20ZE 512 from Bangkok at the gate
20:30M0 602 to Ulaanbaatar leaves the gate
14 h 10 apart on the timetable
M0 602 leaves 14 h 10 after ZE 512 arrives on the timetable: more than half a day, so not a connection we count.