The calculated distance (air line) between Rio Pomba and Duque de Caxias is approximately 105 miles respectively 169 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 Rio Pomba and Duque de Caxias has been calculated here.
Air line (approximately)
169 kilometers
91 nautical miles