BA 633 then BA 664 at Heathrow
Athens → London → Larnaca
Timetable, London time
18:55BA 633 from Athens at the gate
17:35BA 664 to Larnaca leaves the gate
22 h 40 apart on the timetable, overnight
BA 664 leaves 22 h 40 after BA 633 arrives on the timetable: more than half a day, so not a connection we count.