The calculated distance (air line) between Tuyên Quang and Sơn Tây is approximately 51 miles respectively 82 kilometers.
By car or train, the actual journey to Sơn Tây is certainly longer, as only the direct route (as the crow flies) between Tuyên Quang and Sơn Tây has been calculated here.
Air line (approximately)
82 kilometers
44 nautical miles