The calculated distance (air line) between Khao Yoi and Samut Prakan is approximately 58 miles respectively 93 kilometers.
By car or train, the actual journey to Samut Prakan is certainly longer, as only the direct route (as the crow flies) between Khao Yoi and Samut Prakan has been calculated here.
Air line (approximately)
93 kilometers
50 nautical miles