The calculated distance (air line) between Semënov and Nizhniy Novgorod is approximately 37 miles respectively 59 kilometers.
By car or train, the actual journey to Nizhniy Novgorod is certainly longer, as only the direct route (as the crow flies) between Semënov and Nizhniy Novgorod has been calculated here.
Air line (approximately)
59 kilometers
32 nautical miles