The calculated distance (air line) between Andratx and L'Hospitalet de Llobregat is approximately 124 miles respectively 200 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 Andratx and L'Hospitalet de Llobregat has been calculated here.
Air line (approximately)
200 kilometers
108 nautical miles