The calculated distance (air line) between Phan Thiết and Thủ Dầu Một is approximately 98 miles respectively 158 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 Phan Thiết and Thủ Dầu Một has been calculated here.
Air line (approximately)
158 kilometers
85 nautical miles