The calculated distance (air line) between Thái Nguyên and Ninh Bình is approximately 93 miles respectively 149 kilometers.
By car or train, the actual journey to Ninh Bình is certainly longer, as only the direct route (as the crow flies) between Thái Nguyên and Ninh Bình has been calculated here.
Air line (approximately)
149 kilometers
81 nautical miles