Vietnam Airlines from Beijing to Phnom Penh has 1 flight every day. And there are 3 flights per week flying out of Beijing which connect to Phnom Penh.
The price for economy class – one way ticket of Vietnam Airlines from Beijing to Phnom Penh is 8.654.000 VND (or ~$431 USD) and the price for bussiness class – one way ticket of Vietnam Airline is 16.239.000 VND (or ~$810 USD).