The calculated distance (air line) between Thái Nguyên and Chí Linh is approximately 47 miles respectively 76 kilometers.
By car or train, the actual journey to Chí Linh is certainly longer, as only the direct route (as the crow flies) between Thái Nguyên and Chí Linh has been calculated here.
Air line (approximately)
76 kilometers
41 nautical miles