The calculated distance (air line) between Samut Songkhram and Phra Pradaeng is approximately 39 miles respectively 63 kilometers.
By car or train, the actual journey to Phra Pradaeng is certainly longer, as only the direct route (as the crow flies) between Samut Songkhram and Phra Pradaeng has been calculated here.
Air line (approximately)
63 kilometers
34 nautical miles