KL 1572 then U2 7925 at Schiphol
Porto → Amsterdam → Prague
Timetable, Amsterdam time
14:55KL 1572 from Porto at the gate
07:20U2 7925 to Prague leaves the gate
16 h 25 apart on the timetable, overnight
U2 7925 leaves 16 h 25 after KL 1572 arrives on the timetable: more than half a day, so not a connection we count.