The calculated distance (air line) between Duque de Caxias and Itaguaí is approximately 30 miles respectively 48 kilometers.
By car or train, the actual journey to Itaguaí is certainly longer, as only the direct route (as the crow flies) between Duque de Caxias and Itaguaí has been calculated here.
Air line (approximately)
48 kilometers
26 nautical miles