The calculated distance (air line) between Duque de Caxias and Seropédica is approximately 25 miles respectively 41 kilometers.
By car or train, the actual journey to Seropédica is certainly longer, as only the direct route (as the crow flies) between Duque de Caxias and Seropédica has been calculated here.
Air line (approximately)
41 kilometers
22 nautical miles