The calculated distance (air line) between L'Hospitalet de Llobregat and Vallirana is approximately 9 miles respectively 14 kilometers.
By car or train, the actual journey to Vallirana is certainly longer, as only the direct route (as the crow flies) between L'Hospitalet de Llobregat and Vallirana has been calculated here.
Air line (approximately)
14 kilometers
8 nautical miles