To do this trip from Istanbul to Aoznjul There are several ways and means of transportation can choose among them according to your desire and goal of the trip, you review the Code of tourism in this thread:
If you just want to move from the city of Istanbul to the city of Aoznjul in a short time and without trouble or hardship without also enjoy the attractions, the road then you can take your plane from Istanbul to the city of Trabzon, and take this flight almost an hour and a half, and the city of Trabzon take a bus or a car.
If you want a relatively short time and the amount paid less then you can take your bus route which takes almost 18 to 20 hours at the most to the city of Trabzon, including traveling by car to Ozoonjul.
If you want to spend a fun ride while enjoying the sights road and scenic nature then you can go from Istanbul to Ozoonjul car reserved you spend by the time you want in the way and stand wherever you want in the long road, The journey takes you 7 days or fifteen days, depending on the number Poses and the time Stqdah in each pause of stay in a hotel or Bed and beautiful places to visit and enjoy the scenery attractive.
The advantage of going private car you reserved you are enjoying complete privacy and comfort, and can be explored and stop at the place you want in exchange for the higher cost of the plane and bus.