The calculated distance (air line) between Póvoa de Santa Iria and Rio de Mouro is approximately 16 miles respectively 25 kilometers.
By car or train, the actual journey to Rio de Mouro is certainly longer, as only the direct route (as the crow flies) between Póvoa de Santa Iria and Rio de Mouro has been calculated here.
Air line (approximately)
25 kilometers
14 nautical miles