The calculated distance (air line) between Huai Khot and Samut Prakan is approximately 134 miles respectively 216 kilometers.
By car or train, the actual journey to Samut Prakan is certainly longer, as only the direct route (as the crow flies) between Huai Khot and Samut Prakan has been calculated here.
Air line (approximately)
216 kilometers
116 nautical miles