Flight Sabiha Gökcen International Airport departs from Istanbul Sabiha Gökcen International Airport at 21:05 and arrives at London Heathrow Airport at 23:05.
The flighttime is about 4h 00m. The distance travelled ("as the bird flies"): 3495 Km. So the average speed is roughly 874 Km.
There is an 2 hour time difference between Istanbul and London