The calculated distance (air line) between Phu Khiao and Sakon Nakhon is approximately 144 miles respectively 232 kilometers.
By car or train, the actual journey to Sakon Nakhon is certainly longer, as only the direct route (as the crow flies) between Phu Khiao and Sakon Nakhon has been calculated here.
Air line (approximately)
232 kilometers
125 nautical miles