Are there nonstop flights from Nha Trang (CXR) to Ulaanbaatar (UBN)?

Yes. VietJet Air fly this route. Flight time is about 5h 10m.

What is the fastest connection from Nha Trang (CXR) to Ulaanbaatar (UBN)?

via Guangzhou ≈ 5h 49m, via Shenzhen ≈ 5h 51m, via Hong Kong ≈ 5h 52m (estimated flying time, excluding layovers).

from 15,000 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

Cam Ranh International Airport / Cam Ranh Air Base (CXR) to Ulaanbaatar Chinggis Khaan International Airport (UBN)・3,970 km

Nonstop flights available (1 airline). Flight time about 5h 10m. Nonstop return flights also operate.

With milesANA 15,000 miles+ (via ICN)JAL 23,000 miles+ (via ICN)Economy, one way, estimate. Tap a connection for miles by cabin.

15 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.