The calculated distance (air line) between Erzurum and Doğubayazıt is approximately 151 miles respectively 243 kilometers.
By car or train, the actual journey to Doğubayazıt is certainly longer, as only the direct route (as the crow flies) between Erzurum and Doğubayazıt has been calculated here.
Air line (approximately)
243 kilometers
131 nautical miles