The calculated distance (air line) between Sentmenat and L'Hospitalet de Llobregat is approximately 17 miles respectively 28 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 Sentmenat and L'Hospitalet de Llobregat has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles