The calculated distance (air line) between Nong Bua and Phasi Charoen is approximately 149 miles respectively 240 kilometers.
By car or train, the actual journey to Phasi Charoen is certainly longer, as only the direct route (as the crow flies) between Nong Bua and Phasi Charoen has been calculated here.
Air line (approximately)
240 kilometers
129 nautical miles