The calculated distance (air line) between Vichuga and Nizhniy Novgorod is approximately 100 miles respectively 160 kilometers.
By car or train, the actual journey to Nizhniy Novgorod is certainly longer, as only the direct route (as the crow flies) between Vichuga and Nizhniy Novgorod has been calculated here.
Air line (approximately)
160 kilometers
87 nautical miles