Vietnam Airlines from Vientiane to Osaka has 3 flights every day. And there are 21 flights per week flying out of Vientiane which connect to Osaka.
The price for economy class – one way ticket of Vietnam Airlines from Vientiane to Osaka is 34.617.000 VND (or ~$1729 USD) and the price for bussiness class – one way ticket of Vietnam Airline is 49.145.000 VND (or ~$2455 USD).