The calculated distance (air line) between Ouro Branco and Belo Horizonte is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to Belo Horizonte is certainly longer, as only the direct route (as the crow flies) between Ouro Branco and Belo Horizonte has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles