The calculated distance (air line) between Thái Nguyên and Việt Trì is approximately 34 miles respectively 55 kilometers.
By car or train, the actual journey to Việt Trì is certainly longer, as only the direct route (as the crow flies) between Thái Nguyên and Việt Trì has been calculated here.
Air line (approximately)
55 kilometers
30 nautical miles