The calculated distance (air line) between Horta-Guinardó and Sant Just Desvern is approximately 6 miles respectively 9 kilometers.
By car or train, the actual journey to Sant Just Desvern is certainly longer, as only the direct route (as the crow flies) between Horta-Guinardó and Sant Just Desvern has been calculated here.
Air line (approximately)
9 kilometers
5 nautical miles