Are there nonstop flights from Nizhneangarsk (NZG) to Ulan Ude (UUD)?

Yes. IrAero, Ayana (airline) fly this route. Flight time is about 1h 3m.

Nizhneangarsk → Ulan Ude

Nizhneangarsk International Airport (NZG) to Baikal International Airport (UUD)・466 km

Nonstop flights available (2 airlines). Flight time about 1h 3m. Nonstop return flights also operate.

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