The calculated distance (air line) between Gölbaşı and Diyarbakır is approximately 141 miles respectively 227 kilometers.
By car or train, the actual journey to Diyarbakır is certainly longer, as only the direct route (as the crow flies) between Gölbaşı and Diyarbakır has been calculated here.
Air line (approximately)
227 kilometers
123 nautical miles