The calculated distance (air line) between Rostov-na-Donu and Zverevo is approximately 58 miles respectively 93 kilometers.
By car or train, the actual journey to Zverevo is certainly longer, as only the direct route (as the crow flies) between Rostov-na-Donu and Zverevo has been calculated here.
Air line (approximately)
93 kilometers
50 nautical miles