UA 27 then TK 6903 at Heathrow
Denver → London → Istanbul
Timetable, London time
09:40UA 27 from Denver 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 07:25 London time
09:38UA 27 expected at the gate2 min early
15:30TK 6903 due to leave, no estimate yet
5 h 52 between the gates, on these times
The last days
UA 27 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.