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