The calculated distance (air line) between Wichian Buri and Chon Buri is approximately 159 miles respectively 256 kilometers.
By car or train, the actual journey to Chon Buri is certainly longer, as only the direct route (as the crow flies) between Wichian Buri and Chon Buri has been calculated here.
Air line (approximately)
256 kilometers
138 nautical miles