The calculated distance (air line) between Buia and Reggio nell'Emilia is approximately 160 miles respectively 257 kilometers.
By car or train, the actual journey to Reggio nell'Emilia is certainly longer, as only the direct route (as the crow flies) between Buia and Reggio nell'Emilia has been calculated here.
Air line (approximately)
257 kilometers
139 nautical miles