Flight Düsseldorf Airport departs from Dusseldorf Düsseldorf Airport at 17:20 and arrives at Istanbul Sabiha Gökcen International Airport at 21:30.
The flighttime is about 3h 10m. The distance travelled ("as the bird flies"): 2733 Km. So the average speed is roughly 863 Km.
There is an 1 hour time difference between Dusseldorf and Istanbul