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