KL 9956 then HV 6867 at Schiphol
Brussels → Amsterdam → Athens
Timetable, Amsterdam time
07:50KL 9956 from Brussels at the gate
07:00HV 6867 to Athens leaves the gate
23 h 10 apart on the timetable, overnight
HV 6867 leaves 23 h 10 after KL 9956 arrives on the timetable: more than half a day, so not a connection we count.