BA 640 then A3 722 at Athens
London Heathrow → Athens → Lisbon
Timetable, Athens time
01:00BA 640 from London Heathrow at the gate
13:50A3 722 to Lisbon leaves the gate
12 h 50 apart on the timetable
A3 722 leaves 12 h 50 after BA 640 arrives on the timetable: more than half a day, so not a connection we count.