The calculated distance (air line) between Mollerussa and L'Hospitalet de Llobregat is approximately 65 miles respectively 104 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 Mollerussa and L'Hospitalet de Llobregat has been calculated here.
Air line (approximately)
104 kilometers
56 nautical miles