The calculated distance (air line) between Biên Hòa and Thủ Dầu Một is approximately 12 miles respectively 19 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 Biên Hòa and Thủ Dầu Một has been calculated here.
Air line (approximately)
19 kilometers
10 nautical miles