The calculated distance (air line) between Sant Quirze del Vallès and Molins de Rei is approximately 9 miles respectively 14 kilometers.
By car or train, the actual journey to Molins de Rei is certainly longer, as only the direct route (as the crow flies) between Sant Quirze del Vallès and Molins de Rei has been calculated here.
Air line (approximately)
14 kilometers
8 nautical miles