Are there nonstop flights from Chengdu (CTU) to Ulaanbaatar (UBN)?

No. The fastest connection is via Hohhot, about 3h 35m of total flying time.

What is the fastest connection from Chengdu (CTU) to Ulaanbaatar (UBN)?

via Hohhot ≈ 3h 35m, via Beijing ≈ 4h 10m, via Beijing ≈ 4h 11m (estimated flying time, excluding layovers).

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

Chengdu Shuangliu International Airport (CTU) to Ulaanbaatar Chinggis Khaan International Airport (UBN)・1,916 km

No nonstop flights. The fastest connection is via Hohhot (HET), about 3h 35m of flying time (layover not included).

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

None.

10 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.