The calculated distance (air line) between Khao Yoi and Nakhon Sawan is approximately 172 miles respectively 276 kilometers.
By car or train, the actual journey to Nakhon Sawan is certainly longer, as only the direct route (as the crow flies) between Khao Yoi and Nakhon Sawan has been calculated here.
Air line (approximately)
276 kilometers
149 nautical miles