Flight Cologne Bonn Airport departs from Cologne Cologne Bonn Airport at 23:15 and arrives at Ankara Ankara Esenboga Airport at 03:40.
The flighttime is about 3h 25m. The distance travelled ("as the bird flies"): 3081 Km. So the average speed is roughly 902 Km.
There is an 1 hour time difference between Cologne and Ankara