The calculated distance (air line) between Phai Sali and Samut Prakan is approximately 138 miles respectively 223 kilometers.
By car or train, the actual journey to Samut Prakan is certainly longer, as only the direct route (as the crow flies) between Phai Sali and Samut Prakan has been calculated here.
Air line (approximately)
223 kilometers
120 nautical miles