The calculated distance (air line) between Badalona and Cornellà de Llobregat is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Cornellà de Llobregat is certainly longer, as only the direct route (as the crow flies) between Badalona and Cornellà de Llobregat has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles