The calculated distance (air line) between Vol’no-Nadezhdinskoye and Dunay is approximately 38 miles respectively 62 kilometers.
By car or train, the actual journey to Dunay is certainly longer, as only the direct route (as the crow flies) between Vol’no-Nadezhdinskoye and Dunay has been calculated here.
Air line (approximately)
62 kilometers
33 nautical miles