The calculated distance (air line) between Thủ Dầu Một and Vị Thanh is approximately 115 miles respectively 185 kilometers.
By car or train, the actual journey to Vị Thanh is certainly longer, as only the direct route (as the crow flies) between Thủ Dầu Một and Vị Thanh has been calculated here.
Air line (approximately)
185 kilometers
100 nautical miles