The calculated distance (air line) between Ilyinogorsk and Nizhniy Novgorod is approximately 41 miles respectively 66 kilometers.
By car or train, the actual journey to Nizhniy Novgorod is certainly longer, as only the direct route (as the crow flies) between Ilyinogorsk and Nizhniy Novgorod has been calculated here.
Air line (approximately)
66 kilometers
35 nautical miles