Are there nonstop flights from Nanning (NNG) to Bandar Seri Begawan (BWN)?

Yes. Royal Brunei Airlines fly this route. Flight time is about 2h 58m.

What is the fastest connection from Nanning (NNG) to Bandar Seri Begawan (BWN)?

via Hong Kong ≈ 3h 59m, via Shenzhen ≈ 4h, via Manila ≈ 4h 24m (estimated flying time, excluding layovers).

from 18,000 ANA miles (economy, one way, based on the published award charts).

Nanning Wuxu International Airport (NNG) to Brunei International Airport (BWN)・2,093 km

Nonstop flights available (1 airline). Flight time about 2h 58m. Nonstop return flights also operate.

With milesANA 18,000 miles+ (via SZX)Economy, one way, estimate. Tap a connection for miles by cabin.

7 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.