The calculated distance (air line) between Paraíba do Sul and Duque de Caxias is approximately 43 miles respectively 70 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 Paraíba do Sul and Duque de Caxias has been calculated here.
Air line (approximately)
70 kilometers
38 nautical miles