The calculated distance (air line) between Lai Châu and Tuyên Quang is approximately 119 miles respectively 192 kilometers.
By car or train, the actual journey to Tuyên Quang is certainly longer, as only the direct route (as the crow flies) between Lai Châu and Tuyên Quang has been calculated here.
Air line (approximately)
192 kilometers
103 nautical miles