The calculated distance (air line) between Sant Andreu de la Barca and Eixample is approximately 11 miles respectively 17 kilometers.
By car or train, the actual journey to Eixample is certainly longer, as only the direct route (as the crow flies) between Sant Andreu de la Barca and Eixample has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles