The calculated distance (air line) between Livorno and Santa Croce sull'Arno is approximately 25 miles respectively 41 kilometers.
By car or train, the actual journey to Santa Croce sull'Arno is certainly longer, as only the direct route (as the crow flies) between Livorno and Santa Croce sull'Arno has been calculated here.
Air line (approximately)
41 kilometers
22 nautical miles