The calculated distance (air line) between Sintra and Figueira da Foz is approximately 97 miles respectively 157 kilometers.
By car or train, the actual journey to Figueira da Foz is certainly longer, as only the direct route (as the crow flies) between Sintra and Figueira da Foz has been calculated here.
Air line (approximately)
157 kilometers
84 nautical miles