BA 871 then TK 6903 at Heathrow
Budapest → London → Istanbul
Timetable, London time
09:40BA 871 from Budapest at the gate
15:30TK 6903 to Istanbul leaves the gate
5 h 50 apart on the timetable
Today
From the airport’s board at 21:45 London time
11:25BA 871 reached the gate1 h 45 late
15:45TK 6903 left the gate15 min late
4 h 20 between the gates
The last days
BA 871 and TK 6903 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.