The calculated distance (air line) between San Gavino Monreale and Carloforte is approximately 38 miles respectively 62 kilometers.
By car or train, the actual journey to Carloforte is certainly longer, as only the direct route (as the crow flies) between San Gavino Monreale and Carloforte has been calculated here.
Air line (approximately)
62 kilometers
33 nautical miles