The calculated distance (air line) between Montornès del Vallès and Vilassar de Mar is approximately 7 miles respectively 11 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 Montornès del Vallès and Vilassar de Mar has been calculated here.
Air line (approximately)
11 kilometers
6 nautical miles