The calculated distance (air line) between Mariana and Duque de Caxias is approximately 167 miles respectively 268 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 Mariana and Duque de Caxias has been calculated here.
Air line (approximately)
268 kilometers
145 nautical miles