The calculated distance (air line) between Thị Trấn Na Sầm and Hanoi is approximately 87 miles respectively 140 kilometers.
By car or train, the actual journey to Hanoi is certainly longer, as only the direct route (as the crow flies) between Thị Trấn Na Sầm and Hanoi has been calculated here.
Air line (approximately)
140 kilometers
75 nautical miles