The calculated distance (air line) between Chon Buri and Samut Sakhon is approximately 49 miles respectively 79 kilometers.
By car or train, the actual journey to Samut Sakhon is certainly longer, as only the direct route (as the crow flies) between Chon Buri and Samut Sakhon has been calculated here.
Air line (approximately)
79 kilometers
43 nautical miles