The calculated distance (air line) between Thap Khlo and Phasi Charoen is approximately 169 miles respectively 272 kilometers.
By car or train, the actual journey to Phasi Charoen is certainly longer, as only the direct route (as the crow flies) between Thap Khlo and Phasi Charoen has been calculated here.
Air line (approximately)
272 kilometers
147 nautical miles