The calculated distance (air line) between Massy and Uch-Korgon is approximately 65 miles respectively 104 kilometers.
By car or train, the actual journey to Uch-Korgon is certainly longer, as only the direct route (as the crow flies) between Massy and Uch-Korgon has been calculated here.
Air line (approximately)
104 kilometers
56 nautical miles