The calculated distance (air line) between Castelldefels and Esplugues de Llobregat is approximately 9 miles respectively 15 kilometers.
By car or train, the actual journey to Esplugues de Llobregat is certainly longer, as only the direct route (as the crow flies) between Castelldefels and Esplugues de Llobregat has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles