The calculated distance (air line) between Trường Sơn and Thanh Hóa is approximately 98 miles respectively 158 kilometers.
By car or train, the actual journey to Thanh Hóa is certainly longer, as only the direct route (as the crow flies) between Trường Sơn and Thanh Hóa has been calculated here.
Air line (approximately)
158 kilometers
85 nautical miles