The calculated distance (air line) between Vilaseca and La Roca del Vallès is approximately 33 miles respectively 54 kilometers.
By car or train, the actual journey to La Roca del Vallès is certainly longer, as only the direct route (as the crow flies) between Vilaseca and La Roca del Vallès has been calculated here.
Air line (approximately)
54 kilometers
29 nautical miles