The calculated distance (air line) between Khlong Luang and Samut Sakhon is approximately 44 miles respectively 70 kilometers.
By car or train, the actual journey to Samut Sakhon is certainly longer, as only the direct route (as the crow flies) between Khlong Luang and Samut Sakhon has been calculated here.
Air line (approximately)
70 kilometers
38 nautical miles