The calculated distance (air line) between Platnirovskaya and Starokorsunskaya is approximately 24 miles respectively 38 kilometers.
By car or train, the actual journey to Starokorsunskaya is certainly longer, as only the direct route (as the crow flies) between Platnirovskaya and Starokorsunskaya has been calculated here.
Air line (approximately)
38 kilometers
20 nautical miles