The calculated distance (air line) between Doğubayazıt and Karakoyunlu is approximately 33 miles respectively 53 kilometers.
By car or train, the actual journey to Karakoyunlu is certainly longer, as only the direct route (as the crow flies) between Doğubayazıt and Karakoyunlu has been calculated here.
Air line (approximately)
53 kilometers
29 nautical miles