The calculated distance (air line) between Uthai Thani and Chon Buri is approximately 153 miles respectively 247 kilometers.
By car or train, the actual journey to Chon Buri is certainly longer, as only the direct route (as the crow flies) between Uthai Thani and Chon Buri has been calculated here.
Air line (approximately)
247 kilometers
133 nautical miles