The calculated distance (air line) between Ban Huai Thalaeng and Chanthaburi is approximately 168 miles respectively 270 kilometers.
By car or train, the actual journey to Chanthaburi is certainly longer, as only the direct route (as the crow flies) between Ban Huai Thalaeng and Chanthaburi has been calculated here.
Air line (approximately)
270 kilometers
146 nautical miles