Are there nonstop flights from Haikou (HAK) to Ho Chi Minh City (SGN)?

Yes. Hainan Airlines, Vietnam Airlines fly this route. Flight time is about 1h 47m.

What is the fastest connection from Haikou (HAK) to Ho Chi Minh City (SGN)?

via Phnom Penh ≈ 2h 33m, via Hanoi ≈ 2h 58m, via Vientiane ≈ 3h 5m (estimated flying time, excluding layovers).

from 15,000 JAL miles, from 18,000 ANA miles (economy, one way, based on the published award charts).

Haikou Meilan International Airport (HAK) to Tan Son Nhat International Airport (SGN)・1,093 km

Nonstop flights available (2 airlines). Flight time about 1h 47m. Nonstop return flights also operate.

With milesJAL 15,000 miles+ (via HKG)ANA 18,000 miles+ (via SZX)Economy, one way, estimate. Tap a connection for miles by cabin.

9 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.