The calculated distance (air line) between Krasnoslobodsk and Nizhniy Novgorod is approximately 132 miles respectively 212 kilometers.
By car or train, the actual journey to Nizhniy Novgorod is certainly longer, as only the direct route (as the crow flies) between Krasnoslobodsk and Nizhniy Novgorod has been calculated here.
Air line (approximately)
212 kilometers
114 nautical miles