The calculated distance (air line) between Ratchaburi and Nakhon Sawan is approximately 151 miles respectively 244 kilometers.
By car or train, the actual journey to Nakhon Sawan is certainly longer, as only the direct route (as the crow flies) between Ratchaburi and Nakhon Sawan has been calculated here.
Air line (approximately)
244 kilometers
131 nautical miles