The calculated distance (air line) between Castanheira do Ribatejo and Algueirão is approximately 24 miles respectively 39 kilometers.
By car or train, the actual journey to Algueirão is certainly longer, as only the direct route (as the crow flies) between Castanheira do Ribatejo and Algueirão has been calculated here.
Air line (approximately)
39 kilometers
21 nautical miles