The calculated distance (air line) between Thái Nguyên and Hà Đông is approximately 43 miles respectively 70 kilometers.
By car or train, the actual journey to Hà Đông is certainly longer, as only the direct route (as the crow flies) between Thái Nguyên and Hà Đông has been calculated here.
Air line (approximately)
70 kilometers
38 nautical miles