The calculated distance (air line) between L'Ametlla del Vallès and Eixample is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Eixample is certainly longer, as only the direct route (as the crow flies) between L'Ametlla del Vallès and Eixample has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles