BA 973 then BA 936 at Heathrow
Berlin → London → Düsseldorf
Timetable, London time
10:55BA 973 from Berlin at the gate
15:30BA 936 to Düsseldorf leaves the gate
4 h 35 apart on the timetable
The last days
BA 973 and BA 936 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.