The calculated distance (air line) between Erciş and Doğubayazıt is approximately 53 miles respectively 85 kilometers.
By car or train, the actual journey to Doğubayazıt is certainly longer, as only the direct route (as the crow flies) between Erciş and Doğubayazıt has been calculated here.
Air line (approximately)
85 kilometers
46 nautical miles