The calculated distance (air line) between Sant Pol de Mar and L'Hospitalet de Llobregat is approximately 32 miles respectively 51 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 Sant Pol de Mar and L'Hospitalet de Llobregat has been calculated here.
Air line (approximately)
51 kilometers
27 nautical miles