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