The calculated distance (air line) between Belluno and Reggio nell'Emilia is approximately 126 miles respectively 203 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 Belluno and Reggio nell'Emilia has been calculated here.
Air line (approximately)
203 kilometers
109 nautical miles