The calculated distance (air line) between Tutong and Bandar Seri Begawan is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Bandar Seri Begawan is certainly longer, as only the direct route (as the crow flies) between Tutong and Bandar Seri Begawan has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles