The calculated distance (air line) between Calella and L'Hospitalet de Llobregat is approximately 34 miles respectively 54 kilometers.
By car or train, the actual journey to L'Hospitalet de Llobregat is certainly longer, as only the direct route (as the crow flies) between Calella and L'Hospitalet de Llobregat has been calculated here.
Air line (approximately)
54 kilometers
29 nautical miles