KL 1374 then U2 7927 at Schiphol
Bucharest → Amsterdam → Prague
Timetable, Amsterdam time
15:55KL 1374 from Bucharest at the gate
13:10U2 7927 to Prague leaves the gate
21 h 15 apart on the timetable, overnight
U2 7927 leaves 21 h 15 after KL 1374 arrives on the timetable: more than half a day, so not a connection we count.