The calculated distance (air line) between Tremp and L'Hospitalet de Llobregat is approximately 84 miles respectively 134 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 Tremp and L'Hospitalet de Llobregat has been calculated here.
Air line (approximately)
134 kilometers
73 nautical miles