The calculated distance (air line) between La Roca del Vallès and Mollet del Vallès is approximately 7 miles respectively 11 kilometers.
By car or train, the actual journey to Mollet del Vallès is certainly longer, as only the direct route (as the crow flies) between La Roca del Vallès and Mollet del Vallès has been calculated here.
Air line (approximately)
11 kilometers
6 nautical miles