Are there nonstop flights from Sanya (SYX) to Bangkok (BKK)?

Yes. Condor Flugdienst fly this route. Flight time is about 1h 45m.

What is the fastest connection from Sanya (SYX) to Bangkok (BKK)?

via Vientiane ≈ 2h 27m, via Phnom Penh ≈ 2h 41m, via Nanning ≈ 3h 4m (estimated flying time, excluding layovers).

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

Sanya Phoenix International Airport (SYX) to Suvarnabhumi Airport (BKK)・1,059 km

Nonstop flights available (1 airline). Flight time about 1h 45m. Nonstop return flights also operate.

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

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.