The calculated distance (air line) between Wichian Buri and Nakhon Sawan is approximately 65 miles respectively 104 kilometers.
By car or train, the actual journey to Nakhon Sawan is certainly longer, as only the direct route (as the crow flies) between Wichian Buri and Nakhon Sawan has been calculated here.
Air line (approximately)
104 kilometers
56 nautical miles