The calculated distance (air line) between Atouguia da Baleia and Barreiro is approximately 49 miles respectively 78 kilometers.
By car or train, the actual journey to Barreiro is certainly longer, as only the direct route (as the crow flies) between Atouguia da Baleia and Barreiro has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles