Flight Sabiha Gökcen International Airport departs from Istanbul Sabiha Gökcen International Airport at 12:40 and arrives at London City Airport at 14:45.
The flighttime is about 4h 05m. The distance travelled ("as the bird flies"): 3442 Km. So the average speed is roughly 843 Km.
There is an 2 hour time difference between Istanbul and London