The calculated distance (air line) between São Mamede de Infesta and Algueirão is approximately 170 miles respectively 273 kilometers.
By car or train, the actual journey to Algueirão is certainly longer, as only the direct route (as the crow flies) between São Mamede de Infesta and Algueirão has been calculated here.
Air line (approximately)
273 kilometers
148 nautical miles