KL 1818 then U2 7925 at Schiphol
Frankfurt am Main → Amsterdam → Prague
Timetable, Amsterdam time
13:00KL 1818 from Frankfurt am Main at the gate
07:00U2 7925 to Prague leaves the gate
18 h apart on the timetable, overnight
U2 7925 leaves 18 h after KL 1818 arrives on the timetable: more than half a day, so not a connection we count.