The calculated distance (air line) between Velykyi Dalnyk and Mykolayiv is approximately 76 miles respectively 123 kilometers.
By car or train, the actual journey to Mykolayiv is certainly longer, as only the direct route (as the crow flies) between Velykyi Dalnyk and Mykolayiv has been calculated here.
Air line (approximately)
123 kilometers
66 nautical miles