The calculated distance (air line) between Sevastopol and Chernomorskoye is approximately 74 miles respectively 119 kilometers.
By car or train, the actual journey to Chernomorskoye is certainly longer, as only the direct route (as the crow flies) between Sevastopol and Chernomorskoye has been calculated here.
Air line (approximately)
119 kilometers
64 nautical miles