The calculated distance (air line) between Amposta and L'Hospitalet de Llobregat is approximately 91 miles respectively 147 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 Amposta and L'Hospitalet de Llobregat has been calculated here.
Air line (approximately)
147 kilometers
79 nautical miles