The calculated distance (air line) between Cambuí and Duque de Caxias is approximately 175 miles respectively 282 kilometers.
By car or train, the actual journey to Duque de Caxias is certainly longer, as only the direct route (as the crow flies) between Cambuí and Duque de Caxias has been calculated here.
Air line (approximately)
282 kilometers
152 nautical miles