The calculated distance (air line) between Iğdır and Doğubayazıt is approximately 26 miles respectively 42 kilometers.
By car or train, the actual journey to Doğubayazıt is certainly longer, as only the direct route (as the crow flies) between Iğdır and Doğubayazıt has been calculated here.
Air line (approximately)
42 kilometers
23 nautical miles