Are there nonstop flights from St. Petersburg (LED) to Bangkok (BKK)?

Yes. Aeroflot fly this route. Flight time is about 9h 27m.

What is the fastest connection from St. Petersburg (LED) to Bangkok (BKK)?

via Almaty ≈ 9h 57m, via Shymkent ≈ 10h 1m, via Yekaterinburg ≈ 10h 1m (estimated flying time, excluding layovers).

from 29,500 ANA miles, from 37,000 JAL miles (economy, one way, based on the published award charts).

Pulkovo Airport (LED) to Suvarnabhumi Airport (BKK)・7,609 km

Nonstop flights available (1 airline). Flight time about 9h 27m. Nonstop return flights also operate.

With milesANA 29,500 miles+ (via IST)JAL 37,000 miles+ (via OVB)Economy, one way, estimate. Tap a connection for miles by cabin.

19 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.