Are there nonstop flights from Khovd (HVD) to Ulaanbaatar (UBN)?

Yes. MIAT Mongolian Airlines fly this route. Flight time is about 1h 50m.

Khovd → Ulaanbaatar

Khovd Airport (HVD) to Ulaanbaatar Chinggis Khaan International Airport (UBN)・1,133 km

Nonstop flights available (1 airline). Flight time about 1h 50m. Nonstop return flights also operate.

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