The calculated distance (air line) between Masis and Doğubayazıt is approximately 40 miles respectively 64 kilometers.
By car or train, the actual journey to Doğubayazıt is certainly longer, as only the direct route (as the crow flies) between Masis and Doğubayazıt has been calculated here.
Air line (approximately)
64 kilometers
35 nautical miles