KE 770 then RS 905 at Incheon
Sapporo → Seoul → Hagåtña
Timetable, Seoul time
20:10KE 770 from Sapporo at the gate
20:00RS 905 to Hagåtña leaves the gate
23 h 50 apart on the timetable, overnight
RS 905 leaves 23 h 50 after KE 770 arrives on the timetable: more than half a day, so not a connection we count.