The calculated distance (air line) between Pionerskoye and Chernomorskoye is approximately 85 miles respectively 137 kilometers.
By car or train, the actual journey to Chernomorskoye is certainly longer, as only the direct route (as the crow flies) between Pionerskoye and Chernomorskoye has been calculated here.
Air line (approximately)
137 kilometers
74 nautical miles