Vietnam Airlines from Vientiane to Frankfurt has 2 flights every day. And there are 11 flights per week flying out of Vientiane which connect to Frankfurt.
The price for economy class – one way ticket of Vietnam Airlines from Vientiane to Frankfurt is 22.064.000 VND (or ~$1101 USD) and the price for bussiness class – one way ticket of Vietnam Airline is 36.689.000 VND (or ~$1832 USD).