BA 301 then A3 609 at Heathrow
Paris Charles de Gaulle → London → Athens
Timetable, London time
10:05BA 301 from Paris Charles de Gaulle at the gate
22:15A3 609 to Athens leaves the gate
12 h 10 apart on the timetable
A3 609 leaves 12 h 10 after BA 301 arrives on the timetable: more than half a day, so not a connection we count.