Are there nonstop flights from Sapporo (CTS) to Bandar Seri Begawan (BWN)?

No. The fastest connection is via Manila, about 6h 51m of total flying time.

What is the fastest connection from Sapporo (CTS) to Bandar Seri Begawan (BWN)?

via Manila ≈ 6h 51m, via Taipei ≈ 6h 56m, via Tokyo ≈ 7h (estimated flying time, excluding layovers).

from 19,000 ANA miles (economy, one way, based on the published award charts).

New Chitose Airport (CTS) to Brunei International Airport (BWN)・4,964 km

No nonstop flights. The fastest connection is via Manila (MNL), about 6h 51m of flying time (layover not included).

With milesANA 19,000 miles+ (via SIN)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

8 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.