The calculated distance (air line) between Ban Huai Thalaeng and Samut Prakan is approximately 168 miles respectively 270 kilometers.
By car or train, the actual journey to Samut Prakan is certainly longer, as only the direct route (as the crow flies) between Ban Huai Thalaeng and Samut Prakan has been calculated here.
Air line (approximately)
270 kilometers
145 nautical miles