The calculated distance (air line) between Giardinetti-Tor Vergata and Prato is approximately 160 miles respectively 257 kilometers.
By car or train, the actual journey to Prato is certainly longer, as only the direct route (as the crow flies) between Giardinetti-Tor Vergata and Prato has been calculated here.
Air line (approximately)
257 kilometers
139 nautical miles