The calculated distance (air line) between Sant Andreu de la Barca and Gràcia is approximately 10 miles respectively 16 kilometers.
By car or train, the actual journey to Gràcia is certainly longer, as only the direct route (as the crow flies) between Sant Andreu de la Barca and Gràcia has been calculated here.
Air line (approximately)
16 kilometers
9 nautical miles