The calculated distance (air line) between Nakhon Luang and Nakhon Sawan is approximately 91 miles respectively 147 kilometers.
By car or train, the actual journey to Nakhon Sawan is certainly longer, as only the direct route (as the crow flies) between Nakhon Luang and Nakhon Sawan has been calculated here.
Air line (approximately)
147 kilometers
79 nautical miles