The calculated distance (air line) between Nakhon Ratchasima and Lop Buri is approximately 97 miles respectively 157 kilometers.
By car or train, the actual journey to Lop Buri is certainly longer, as only the direct route (as the crow flies) between Nakhon Ratchasima and Lop Buri has been calculated here.
Air line (approximately)
157 kilometers
85 nautical miles