The calculated distance (air line) between Mykhaylivka and Kostiantynivka is approximately 33 miles respectively 52 kilometers.
By car or train, the actual journey to Kostiantynivka is certainly longer, as only the direct route (as the crow flies) between Mykhaylivka and Kostiantynivka has been calculated here.
Air line (approximately)
52 kilometers
28 nautical miles