The calculated distance (air line) between Dan Khun Thot and Phasi Charoen is approximately 136 miles respectively 220 kilometers.
By car or train, the actual journey to Phasi Charoen is certainly longer, as only the direct route (as the crow flies) between Dan Khun Thot and Phasi Charoen has been calculated here.
Air line (approximately)
220 kilometers
119 nautical miles