Vietnam Airlines from Frankfurt to Phnom Penh has 3 flights every day. And there are 13 flights per week flying out of Frankfurt which connect to Phnom Penh.
The price for economy class – one way ticket of Vietnam Airlines from Frankfurt to Phnom Penh is 20.676.000 VND (or ~$1032 USD) and the price for bussiness class – one way ticket of Vietnam Airline is 34.131.000 VND (or ~$1705 USD).