KL 606 then HV 6867 at Schiphol
San Francisco → Amsterdam → Athens
Timetable, Amsterdam time
09:10KL 606 from San Francisco at the gate
07:00HV 6867 to Athens leaves the gate
21 h 50 apart on the timetable, overnight
HV 6867 leaves 21 h 50 after KL 606 arrives on the timetable: more than half a day, so not a connection we count.