The calculated distance (air line) between Sant Vicenç de Montalt and La Llagosta is approximately 17 miles respectively 27 kilometers.
By car or train, the actual journey to La Llagosta is certainly longer, as only the direct route (as the crow flies) between Sant Vicenç de Montalt and La Llagosta has been calculated here.
Air line (approximately)
27 kilometers
15 nautical miles