The calculated distance (air line) between Cagliari and San Gavino Monreale is approximately 28 miles respectively 45 kilometers.
By car or train, the actual journey to San Gavino Monreale is certainly longer, as only the direct route (as the crow flies) between Cagliari and San Gavino Monreale has been calculated here.
Air line (approximately)
45 kilometers
24 nautical miles