KL 640 then U2 7925 at Schiphol
San Diego → Amsterdam → Prague
Timetable, Amsterdam time
09:40KL 640 from San Diego at the gate
07:20U2 7925 to Prague leaves the gate
21 h 40 apart on the timetable, overnight
U2 7925 leaves 21 h 40 after KL 640 arrives on the timetable: more than half a day, so not a connection we count.