AY 1333 then BA 1486 at Heathrow
Helsinki → London → Glasgow
Timetable, London time
12:35AY 1333 from Helsinki at the gate
16:20BA 1486 to Glasgow leaves the gate
3 h 45 apart on the timetable
The last days
AY 1333 and BA 1486 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.