The calculated distance (air line) between Phú Quốc and Thủ Dầu Một is approximately 186 miles respectively 299 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 Phú Quốc and Thủ Dầu Một has been calculated here.
Air line (approximately)
299 kilometers
161 nautical miles