Flight Düsseldorf Airport departs from Dusseldorf Düsseldorf Airport at 12:45 and arrives at Istanbul Sabiha Gökcen International Airport at 17:55.
The flighttime is about 4h 10m. The distance travelled ("as the bird flies"): 2733 Km. So the average speed is roughly 656 Km.
There is an 1 hour time difference between Dusseldorf and Istanbul