The calculated distance (air line) between Hạ Long and Tuyên Quang is approximately 134 miles respectively 216 kilometers.
By car or train, the actual journey to Tuyên Quang is certainly longer, as only the direct route (as the crow flies) between Hạ Long and Tuyên Quang has been calculated here.
Air line (approximately)
216 kilometers
116 nautical miles