The calculated distance (air line) between Vyerkhnyadzvinsk and Mahilyow is approximately 160 miles respectively 258 kilometers.
By car or train, the actual journey to Mahilyow is certainly longer, as only the direct route (as the crow flies) between Vyerkhnyadzvinsk and Mahilyow has been calculated here.
Air line (approximately)
258 kilometers
139 nautical miles