KL 1572 then U2 7899 at Schiphol
Porto → Amsterdam → Valencia
Timetable, Amsterdam time
14:55KL 1572 from Porto at the gate
07:00U2 7899 to Valencia leaves the gate
16 h 05 apart on the timetable, overnight
U2 7899 leaves 16 h 05 after KL 1572 arrives on the timetable: more than half a day, so not a connection we count.