The calculated distance (air line) between Samut Prakan and Phasi Charoen is approximately 13 miles respectively 22 kilometers.
By car or train, the actual journey to Phasi Charoen is certainly longer, as only the direct route (as the crow flies) between Samut Prakan and Phasi Charoen has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles