The calculated distance (air line) between Lungtenzampa and Trashi Yangtse is approximately 114 miles respectively 183 kilometers.
By car or train, the actual journey to Trashi Yangtse is certainly longer, as only the direct route (as the crow flies) between Lungtenzampa and Trashi Yangtse has been calculated here.
Air line (approximately)
183 kilometers
99 nautical miles