The calculated distance (air line) between Nakhon Nayok and Phasi Charoen is approximately 62 miles respectively 100 kilometers.
By car or train, the actual journey to Phasi Charoen is certainly longer, as only the direct route (as the crow flies) between Nakhon Nayok and Phasi Charoen has been calculated here.
Air line (approximately)
100 kilometers
54 nautical miles