The calculated distance (air line) between Rastignano-Carteria di Sesto and Decima is approximately 20 miles respectively 32 kilometers.
By car or train, the actual journey to Decima is certainly longer, as only the direct route (as the crow flies) between Rastignano-Carteria di Sesto and Decima has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles