U2 3853 then KL 1531 at Schiphol
Milan → Amsterdam → Valencia
Timetable, Amsterdam time
18:55U2 3853 from Milan at the gate
13:45KL 1531 to Valencia leaves the gate
18 h 50 apart on the timetable, overnight
KL 1531 leaves 18 h 50 after U2 3853 arrives on the timetable: more than half a day, so not a connection we count.