The calculated distance (air line) between Rostov-na-Donu and Vesëlyy is approximately 49 miles respectively 79 kilometers.
By car or train, the actual journey to Vesëlyy is certainly longer, as only the direct route (as the crow flies) between Rostov-na-Donu and Vesëlyy has been calculated here.
Air line (approximately)
79 kilometers
42 nautical miles