BA 250 then BA 674 at Heathrow
Santiago de Chile → London → Istanbul
Timetable, London time
06:35BA 250 from Santiago de Chile at the gate
10:10BA 674 to Istanbul leaves the gate
3 h 35 apart on the timetable
The last days
BA 250 and BA 674 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.