The calculated distance (air line) between Rostov-na-Donu and Kuleshovka is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Kuleshovka is certainly longer, as only the direct route (as the crow flies) between Rostov-na-Donu and Kuleshovka has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles