The calculated distance (air line) between Samut Songkhram and Chon Buri is approximately 66 miles respectively 106 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 Songkhram and Chon Buri has been calculated here.
Air line (approximately)
106 kilometers
57 nautical miles