Are there nonstop flights from Ulaanbaatar (UBN) to Guangzhou (CAN)?

Yes. MIAT Mongolian Airlines fly this route. Flight time is about 3h 45m.

What is the fastest connection from Ulaanbaatar (UBN) to Guangzhou (CAN)?

via Ordos ≈ 4h 14m, via Hohhot ≈ 4h 17m, via Beijing ≈ 4h 32m (estimated flying time, excluding layovers).

from 18,000 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

Ulaanbaatar Chinggis Khaan International Airport (UBN) to Guangzhou Baiyun International Airport (CAN)・2,758 km

Nonstop flights available (1 airline). Flight time about 3h 45m. Nonstop return flights also operate.

With milesANA 18,000 miles+ (via HET)JAL 23,000 miles+ (via ICN)Economy, one way, estimate. Tap a connection for miles by cabin.

17 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.