The calculated distance (air line) between Prakhon Chai and Phra Pradaeng is approximately 185 miles respectively 298 kilometers.
By car or train, the actual journey to Phra Pradaeng is certainly longer, as only the direct route (as the crow flies) between Prakhon Chai and Phra Pradaeng has been calculated here.
Air line (approximately)
298 kilometers
161 nautical miles