BA 1473 then BA 1310 at Heathrow
Glasgow → London → Aberdeen
Timetable, London time
10:30BA 1473 from Glasgow at the gate
14:10BA 1310 to Aberdeen leaves the gate
3 h 40 apart on the timetable
The last days
BA 1473 and BA 1310 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.