The calculated distance (air line) between Casano-Dogana-Isola and Livorno is approximately 40 miles respectively 64 kilometers.
By car or train, the actual journey to Livorno is certainly longer, as only the direct route (as the crow flies) between Casano-Dogana-Isola and Livorno has been calculated here.
Air line (approximately)
64 kilometers
34 nautical miles