KL 592 then HV 6867 at Schiphol
Johannesburg → Amsterdam → Athens
Timetable, Amsterdam time
10:10KL 592 from Johannesburg at the gate
07:00HV 6867 to Athens leaves the gate
20 h 50 apart on the timetable, overnight
HV 6867 leaves 20 h 50 after KL 592 arrives on the timetable: more than half a day, so not a connection we count.