The calculated distance (air line) between Rostov-na-Donu and Pokrovskoye is approximately 41 miles respectively 66 kilometers.
By car or train, the actual journey to Pokrovskoye is certainly longer, as only the direct route (as the crow flies) between Rostov-na-Donu and Pokrovskoye has been calculated here.
Air line (approximately)
66 kilometers
35 nautical miles