The calculated distance (air line) between Aydıntepe and Diyarbakır is approximately 171 miles respectively 275 kilometers.
By car or train, the actual journey to Diyarbakır is certainly longer, as only the direct route (as the crow flies) between Aydıntepe and Diyarbakır has been calculated here.
Air line (approximately)
275 kilometers
148 nautical miles