The calculated distance (air line) between Doembang Nangbuat and Chon Buri is approximately 118 miles respectively 189 kilometers.
By car or train, the actual journey to Chon Buri is certainly longer, as only the direct route (as the crow flies) between Doembang Nangbuat and Chon Buri has been calculated here.
Air line (approximately)
189 kilometers
102 nautical miles