The calculated distance (air line) between Kamyanka-Dniprovska and Mykolayiv is approximately 119 miles respectively 191 kilometers.
By car or train, the actual journey to Mykolayiv is certainly longer, as only the direct route (as the crow flies) between Kamyanka-Dniprovska and Mykolayiv has been calculated here.
Air line (approximately)
191 kilometers
103 nautical miles