The calculated distance (air line) between Long Xuyên and Thốt Nốt is approximately 10 miles respectively 17 kilometers.
By car or train, the actual journey to Thốt Nốt is certainly longer, as only the direct route (as the crow flies) between Long Xuyên and Thốt Nốt has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles