The calculated distance (air line) between Samut Prakan and Chon Buri is approximately 31 miles respectively 49 kilometers.
By car or train, the actual journey to Chon Buri is certainly longer, as only the direct route (as the crow flies) between Samut Prakan and Chon Buri has been calculated here.
Air line (approximately)
49 kilometers
27 nautical miles