Flight Sabiha Gökcen International Airport departs from Istanbul Sabiha Gökcen International Airport at 14:40 and arrives at London Heathrow Airport at 16:50.
The flighttime is about 4h 10m. The distance travelled ("as the bird flies"): 3495 Km. So the average speed is roughly 839 Km.
There is an 2 hour time difference between Istanbul and London