The calculated distance (air line) between Dubrovytsia and Byelaazyorsk is approximately 86 miles respectively 138 kilometers.
By car or train, the actual journey to Byelaazyorsk is certainly longer, as only the direct route (as the crow flies) between Dubrovytsia and Byelaazyorsk has been calculated here.
Air line (approximately)
138 kilometers
74 nautical miles