The calculated distance (air line) between Corbera de Llobregat and Martorell is approximately 4 miles respectively 6 kilometers.
By car or train, the actual journey to Martorell is certainly longer, as only the direct route (as the crow flies) between Corbera de Llobregat and Martorell has been calculated here.
Air line (approximately)
6 kilometers
3 nautical miles