KL 777 then KL 1709 at Schiphol
Port of Spain → Amsterdam → Luxembourg
Timetable, Amsterdam time
12:00KL 777 from Port of Spain at the gate
09:30KL 1709 to Luxembourg leaves the gate
21 h 30 apart on the timetable, overnight
KL 1709 leaves 21 h 30 after KL 777 arrives on the timetable: more than half a day, so not a connection we count.