The calculated distance (air line) between L'Hospitalet de Llobregat and Huesca is approximately 140 miles respectively 225 kilometers.
By car or train, the actual journey to Huesca is certainly longer, as only the direct route (as the crow flies) between L'Hospitalet de Llobregat and Huesca has been calculated here.
Air line (approximately)
225 kilometers
122 nautical miles