The calculated distance (air line) between São Bartolomeu de Messines and Barreiro is approximately 106 miles respectively 171 kilometers.
By car or train, the actual journey to Barreiro is certainly longer, as only the direct route (as the crow flies) between São Bartolomeu de Messines and Barreiro has been calculated here.
Air line (approximately)
171 kilometers
92 nautical miles