The calculated distance (air line) between Salmās and Doğubayazıt is approximately 100 miles respectively 161 kilometers.
By car or train, the actual journey to Doğubayazıt is certainly longer, as only the direct route (as the crow flies) between Salmās and Doğubayazıt has been calculated here.
Air line (approximately)
161 kilometers
87 nautical miles