The calculated distance (air line) between Sant Just Desvern and Sant Andreu de la Barca is approximately 7 miles respectively 11 kilometers.
By car or train, the actual journey to Sant Andreu de la Barca is certainly longer, as only the direct route (as the crow flies) between Sant Just Desvern and Sant Andreu de la Barca has been calculated here.
Air line (approximately)
11 kilometers
6 nautical miles