The calculated distance (air line) between Gavà and L'Hospitalet de Llobregat is approximately 6 miles respectively 10 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 Gavà and L'Hospitalet de Llobregat has been calculated here.
Air line (approximately)
10 kilometers
6 nautical miles