KL 777 then JU 261 at Schiphol
Port of Spain → Amsterdam → Belgrade
Timetable, Amsterdam time
12:00KL 777 from Port of Spain at the gate
10:00JU 261 to Belgrade leaves the gate
22 h apart on the timetable, overnight
JU 261 leaves 22 h after KL 777 arrives on the timetable: more than half a day, so not a connection we count.