The calculated distance (air line) between Thap Khlo and Phra Pradaeng is approximately 173 miles respectively 278 kilometers.
By car or train, the actual journey to Phra Pradaeng is certainly longer, as only the direct route (as the crow flies) between Thap Khlo and Phra Pradaeng has been calculated here.
Air line (approximately)
278 kilometers
150 nautical miles