BA 733 then BA 990 at Heathrow
Geneva → London → Berlin
Timetable, London time
15:20BA 733 from Geneva at the gate
17:05BA 990 to Berlin leaves the gate
1 h 45 apart on the timetable
The last days
BA 733 and BA 990 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.