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