BA 583 then BA 1314 at Heathrow
Milan → London → Aberdeen
Timetable, London time
13:30BA 583 from Milan at the gate
16:15BA 1314 to Aberdeen leaves the gate
2 h 45 apart on the timetable
The last days
BA 583 and BA 1314 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.