KL 777 then KL 661 at Schiphol
Port of Spain → Amsterdam → Houston
Timetable, Amsterdam time
12:00KL 777 from Port of Spain at the gate
09:35KL 661 to Houston leaves the gate
21 h 35 apart on the timetable, overnight
KL 661 leaves 21 h 35 after KL 777 arrives on the timetable: more than half a day, so not a connection we count.