The calculated distance (air line) between Novomykolayivka and Novodonetske is approximately 68 miles respectively 109 kilometers.
By car or train, the actual journey to Novodonetske is certainly longer, as only the direct route (as the crow flies) between Novomykolayivka and Novodonetske has been calculated here.
Air line (approximately)
109 kilometers
59 nautical miles