The calculated distance (air line) between Phak Hai and Phra Pradaeng is approximately 56 miles respectively 91 kilometers.
By car or train, the actual journey to Phra Pradaeng is certainly longer, as only the direct route (as the crow flies) between Phak Hai and Phra Pradaeng has been calculated here.
Air line (approximately)
91 kilometers
49 nautical miles