The calculated distance (air line) between Tuyên Quang and Móng Cái is approximately 178 miles respectively 286 kilometers.
By car or train, the actual journey to Móng Cái is certainly longer, as only the direct route (as the crow flies) between Tuyên Quang and Móng Cái has been calculated here.
Air line (approximately)
286 kilometers
154 nautical miles