The calculated distance (air line) between Cam Ranh and Thủ Dầu Một is approximately 182 miles respectively 293 kilometers.
By car or train, the actual journey to Thủ Dầu Một is certainly longer, as only the direct route (as the crow flies) between Cam Ranh and Thủ Dầu Một has been calculated here.
Air line (approximately)
293 kilometers
158 nautical miles