The calculated distance (air line) between Nepomuceno and Duque de Caxias is approximately 163 miles respectively 263 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 Nepomuceno and Duque de Caxias has been calculated here.
Air line (approximately)
263 kilometers
142 nautical miles