The calculated distance (air line) between Novomykolayivka and Dobropillia is approximately 64 miles respectively 103 kilometers.
By car or train, the actual journey to Dobropillia is certainly longer, as only the direct route (as the crow flies) between Novomykolayivka and Dobropillia has been calculated here.
Air line (approximately)
103 kilometers
56 nautical miles