Flight Sabiha Gökcen International Airport departs from Istanbul Sabiha Gökcen International Airport at 16:10 and arrives at London City Airport at 18:20.
The flighttime is about 4h 10m. The distance travelled ("as the bird flies"): 3442 Km. So the average speed is roughly 826 Km.
There is an 2 hour time difference between Istanbul and London