The calculated distance (air line) between Novomykolayivka and Petropavlivka is approximately 42 miles respectively 67 kilometers.
By car or train, the actual journey to Petropavlivka is certainly longer, as only the direct route (as the crow flies) between Novomykolayivka and Petropavlivka has been calculated here.
Air line (approximately)
67 kilometers
36 nautical miles