The calculated distance (air line) between Phra Pradaeng and Suphan Buri is approximately 63 miles respectively 101 kilometers.
By car or train, the actual journey to Suphan Buri is certainly longer, as only the direct route (as the crow flies) between Phra Pradaeng and Suphan Buri has been calculated here.
Air line (approximately)
101 kilometers
54 nautical miles