The calculated distance (air line) between Kut Chap and Sakon Nakhon is approximately 106 miles respectively 170 kilometers.
By car or train, the actual journey to Sakon Nakhon is certainly longer, as only the direct route (as the crow flies) between Kut Chap and Sakon Nakhon has been calculated here.
Air line (approximately)
170 kilometers
92 nautical miles