The calculated distance (air line) between Phai Sali and Nakhon Sawan is approximately 35 miles respectively 56 kilometers.
By car or train, the actual journey to Nakhon Sawan is certainly longer, as only the direct route (as the crow flies) between Phai Sali and Nakhon Sawan has been calculated here.
Air line (approximately)
56 kilometers
30 nautical miles