The calculated distance (air line) between Calella and L'Ametlla del Vallès is approximately 20 miles respectively 33 kilometers.
By car or train, the actual journey to L'Ametlla del Vallès is certainly longer, as only the direct route (as the crow flies) between Calella and L'Ametlla del Vallès has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles