The calculated distance (air line) between Vĩnh Yên and Thái Nguyên is approximately 25 miles respectively 41 kilometers.
By car or train, the actual journey to Thái Nguyên is certainly longer, as only the direct route (as the crow flies) between Vĩnh Yên and Thái Nguyên has been calculated here.
Air line (approximately)
41 kilometers
22 nautical miles