BA 369 then BA 752 at Heathrow
Marseille → London → Geneva
Timetable, London time
16:45BA 369 from Marseille at the gate
19:25BA 752 to Geneva leaves the gate
2 h 40 apart on the timetable
The last days
BA 369 and BA 752 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.