KL 856 then U2 2166 at Schiphol
Seoul → Amsterdam → Manchester
Timetable, Amsterdam time
05:20KL 856 from Seoul at the gate
17:50U2 2166 to Manchester leaves the gate
12 h 30 apart on the timetable
U2 2166 leaves 12 h 30 after KL 856 arrives on the timetable: more than half a day, so not a connection we count.