The calculated distance (air line) between Rostov-na-Donu and Samarskoye is approximately 20 miles respectively 33 kilometers.
By car or train, the actual journey to Samarskoye is certainly longer, as only the direct route (as the crow flies) between Rostov-na-Donu and Samarskoye has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles