The calculated distance (air line) between Hvardiiske and Nizhnegorskiy is approximately 42 miles respectively 67 kilometers.
By car or train, the actual journey to Nizhnegorskiy is certainly longer, as only the direct route (as the crow flies) between Hvardiiske and Nizhnegorskiy has been calculated here.
Air line (approximately)
67 kilometers
36 nautical miles