The calculated distance (air line) between Prachuap Khiri Khan and Nong Chok is approximately 158 miles respectively 255 kilometers.
By car or train, the actual journey to Nong Chok is certainly longer, as only the direct route (as the crow flies) between Prachuap Khiri Khan and Nong Chok has been calculated here.
Air line (approximately)
255 kilometers
137 nautical miles