The calculated distance (air line) between Samut Songkhram and Phasi Charoen is approximately 36 miles respectively 58 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 Songkhram and Phasi Charoen has been calculated here.
Air line (approximately)
58 kilometers
31 nautical miles