The calculated distance (air line) between Sam Roi Yot and Samut Prakan is approximately 104 miles respectively 167 kilometers.
By car or train, the actual journey to Samut Prakan is certainly longer, as only the direct route (as the crow flies) between Sam Roi Yot and Samut Prakan has been calculated here.
Air line (approximately)
167 kilometers
90 nautical miles