The calculated distance (air line) between Mala Bilozerka and Mykolayiv is approximately 140 miles respectively 225 kilometers.
By car or train, the actual journey to Mykolayiv is certainly longer, as only the direct route (as the crow flies) between Mala Bilozerka and Mykolayiv has been calculated here.
Air line (approximately)
225 kilometers
121 nautical miles