Are there nonstop flights from Dalanzadgad (DLZ) to Ulaanbaatar (UBN)?

Yes. MIAT Mongolian Airlines fly this route. Flight time is about 1h 4m.

Dalanzadgad → Ulaanbaatar

Dalanzadgad Airport (DLZ) to Ulaanbaatar Chinggis Khaan International Airport (UBN)・488 km

Nonstop flights available (1 airline). Flight time about 1h 4m. Nonstop return flights also operate.

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