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