The calculated distance (air line) between Manturovo and Nizhniy Novgorod is approximately 141 miles respectively 227 kilometers.
By car or train, the actual journey to Nizhniy Novgorod is certainly longer, as only the direct route (as the crow flies) between Manturovo and Nizhniy Novgorod has been calculated here.
Air line (approximately)
227 kilometers
122 nautical miles