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