The calculated distance (air line) between Sentmenat and Olesa de Montserrat is approximately 13 miles respectively 21 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 Sentmenat and Olesa de Montserrat has been calculated here.
Air line (approximately)
21 kilometers
12 nautical miles