The calculated distance (air line) between Diyarbakır and Kızıltepe is approximately 54 miles respectively 87 kilometers.
By car or train, the actual journey to Kızıltepe is certainly longer, as only the direct route (as the crow flies) between Diyarbakır and Kızıltepe has been calculated here.
Air line (approximately)
87 kilometers
47 nautical miles