The calculated distance (air line) between Platnirovskaya and Rostov-na-Donu is approximately 128 miles respectively 206 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 Platnirovskaya and Rostov-na-Donu has been calculated here.
Air line (approximately)
206 kilometers
111 nautical miles