The calculated distance (air line) between La Roca del Vallès and Caldes de Montbui is approximately 9 miles respectively 15 kilometers.
By car or train, the actual journey to Caldes de Montbui is certainly longer, as only the direct route (as the crow flies) between La Roca del Vallès and Caldes de Montbui has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles