The calculated distance (air line) between Phanom Sarakham and Ratchaburi is approximately 104 miles respectively 167 kilometers.
By car or train, the actual journey to Ratchaburi is certainly longer, as only the direct route (as the crow flies) between Phanom Sarakham and Ratchaburi has been calculated here.
Air line (approximately)
167 kilometers
90 nautical miles