The calculated distance (air line) between Sant Vicenç de Montalt and Vilassar de Mar is approximately 8 miles respectively 13 kilometers.
By car or train, the actual journey to Vilassar de Mar is certainly longer, as only the direct route (as the crow flies) between Sant Vicenç de Montalt and Vilassar de Mar has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles