The calculated distance (air line) between Zaragoza and Sant Boi de Llobregat is approximately 152 miles respectively 245 kilometers.
By car or train, the actual journey to Sant Boi de Llobregat is certainly longer, as only the direct route (as the crow flies) between Zaragoza and Sant Boi de Llobregat has been calculated here.
Air line (approximately)
245 kilometers
132 nautical miles