The calculated distance (air line) between Tash-Kumyr and Uch-Korgon is approximately 78 miles respectively 125 kilometers.
By car or train, the actual journey to Uch-Korgon is certainly longer, as only the direct route (as the crow flies) between Tash-Kumyr and Uch-Korgon has been calculated here.
Air line (approximately)
125 kilometers
67 nautical miles