The calculated distance (air line) between Si Bun Rueang and Nakhon Sawan is approximately 167 miles respectively 268 kilometers.
By car or train, the actual journey to Nakhon Sawan is certainly longer, as only the direct route (as the crow flies) between Si Bun Rueang and Nakhon Sawan has been calculated here.
Air line (approximately)
268 kilometers
145 nautical miles