BA 8455 then HV 6865 at Schiphol
London City → Amsterdam → Athens
Timetable, Amsterdam time
17:35BA 8455 from London City at the gate
15:50HV 6865 to Athens leaves the gate
22 h 15 apart on the timetable, overnight
HV 6865 leaves 22 h 15 after BA 8455 arrives on the timetable: more than half a day, so not a connection we count.