The calculated distance (air line) between Charneca de Caparica and Sesimbra is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Sesimbra is certainly longer, as only the direct route (as the crow flies) between Charneca de Caparica and Sesimbra has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles