The calculated distance (air line) between Kocaköy and Diyarbakır is approximately 30 miles respectively 48 kilometers.
By car or train, the actual journey to Diyarbakır is certainly longer, as only the direct route (as the crow flies) between Kocaköy and Diyarbakır has been calculated here.
Air line (approximately)
48 kilometers
26 nautical miles