Are there nonstop flights from Uliastai (ULZ) to Ulaanbaatar (UBN)?

Yes. MIAT Mongolian Airlines fly this route. Flight time is about 1h 24m.

Uliastai → Ulaanbaatar

Donoi Airport (ULZ) to Ulaanbaatar Chinggis Khaan International Airport (UBN)・770 km

Nonstop flights available (1 airline). Flight time about 1h 24m. Nonstop return flights also operate.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.