The calculated distance (air line) between Nong Bua and Samut Prakan is approximately 157 miles respectively 252 kilometers.
By car or train, the actual journey to Samut Prakan is certainly longer, as only the direct route (as the crow flies) between Nong Bua and Samut Prakan has been calculated here.
Air line (approximately)
252 kilometers
136 nautical miles