The calculated distance (air line) between Gràcia and El Prat de Llobregat is approximately 6 miles respectively 10 kilometers.
By car or train, the actual journey to El Prat de Llobregat is certainly longer, as only the direct route (as the crow flies) between Gràcia and El Prat de Llobregat has been calculated here.
Air line (approximately)
10 kilometers
5 nautical miles