The calculated distance (air line) between Onda and L'Hospitalet de Llobregat is approximately 157 miles respectively 252 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 Onda and L'Hospitalet de Llobregat has been calculated here.
Air line (approximately)
252 kilometers
136 nautical miles