Vietnam Airlines from Vientiane to Moscow has 1 flight every day. And there are 3 flights per week flying out of Vientiane which connect to Moscow.
The price for economy class – one way ticket of Vietnam Airlines from Vientiane to Moscow is 16.907.000 VND (or ~$843 USD) and the price for bussiness class – one way ticket of Vietnam Airline is 36.680.000 VND (or ~$1832 USD).