HV 6868 then BA 441 at Schiphol
Athens → Amsterdam → London Heathrow
Timetable, Amsterdam time
23:20HV 6868 from Athens at the gate
17:20BA 441 to London Heathrow leaves the gate
18 h apart on the timetable, overnight
BA 441 leaves 18 h after HV 6868 arrives on the timetable: more than half a day, so not a connection we count.