KL 856 then HV 6001 at Schiphol
Seoul → Amsterdam → Porto
Timetable, Amsterdam time
05:20KL 856 from Seoul at the gate
17:35HV 6001 to Porto leaves the gate
12 h 15 apart on the timetable
HV 6001 leaves 12 h 15 after KL 856 arrives on the timetable: more than half a day, so not a connection we count.