The calculated distance (air line) between Prachin Buri and Nakhon Sawan is approximately 141 miles respectively 227 kilometers.
By car or train, the actual journey to Nakhon Sawan is certainly longer, as only the direct route (as the crow flies) between Prachin Buri and Nakhon Sawan has been calculated here.
Air line (approximately)
227 kilometers
122 nautical miles