Are there nonstop flights from St. Petersburg (LED) to Sanya (SYX)?

Yes. Aeroflot fly this route. Flight time is about 9h 30m.

What is the fastest connection from St. Petersburg (LED) to Sanya (SYX)?

via Yekaterinburg ≈ 10h, via Astana ≈ 10h, via Ufa ≈ 10h 2m (estimated flying time, excluding layovers).

from 37,000 JAL miles (economy, one way, based on the published award charts).

Pulkovo Airport (LED) to Sanya Phoenix International Airport (SYX)・7,652 km

Nonstop flights available (1 airline). Flight time about 9h 30m. Nonstop return flights also operate.

With milesJAL 37,000 miles+ (via PVG)Economy, one way, estimate. Tap a connection for miles by cabin.

16 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.