KE 108 then ZE 581 at Incheon
Hangzhou → Seoul → Duong Dong
Timetable, Seoul time
18:05KE 108 from Hangzhou at the gate
17:20ZE 581 to Duong Dong leaves the gate
23 h 15 apart on the timetable, overnight
ZE 581 leaves 23 h 15 after KE 108 arrives on the timetable: more than half a day, so not a connection we count.