The calculated distance (air line) between Chon Daen and Phasi Charoen is approximately 173 miles respectively 279 kilometers.
By car or train, the actual journey to Phasi Charoen is certainly longer, as only the direct route (as the crow flies) between Chon Daen and Phasi Charoen has been calculated here.
Air line (approximately)
279 kilometers
151 nautical miles