Are there nonstop flights from Haikou (HAK) to Bandar Seri Begawan (BWN)?

No. The fastest connection is via Kota Kinabalu, about 3h 10m of total flying time.

What is the fastest connection from Haikou (HAK) to Bandar Seri Begawan (BWN)?

via Kota Kinabalu ≈ 3h 10m, via Ho Chi Minh City ≈ 3h 36m, via Hong Kong ≈ 3h 48m (estimated flying time, excluding layovers).

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

Haikou Meilan International Airport (HAK) to Brunei International Airport (BWN)・1,736 km

No nonstop flights. The fastest connection is via Kota Kinabalu (BKI), about 3h 10m of flying time (layover not included).

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

None.

10 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.