The calculated distance (air line) between El Prat de Llobregat and Ripollet is approximately 12 miles respectively 20 kilometers.
By car or train, the actual journey to Ripollet is certainly longer, as only the direct route (as the crow flies) between El Prat de Llobregat and Ripollet has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles