The calculated distance (air line) between Póvoa de Santo Adrião and Barreiro is approximately 11 miles respectively 17 kilometers.
By car or train, the actual journey to Barreiro is certainly longer, as only the direct route (as the crow flies) between Póvoa de Santo Adrião and Barreiro has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles