Vietnam Airlines from Siem Reap to Beijing has 4 flights every day. And there are 16 flights per week flying out of Siem Reap which connect to Beijing.
The price for economy class – one way ticket of Vietnam Airlines from Siem Reap to Beijing is 8.752.000 VND (or ~$436 USD) and the price for bussiness class – one way ticket of Vietnam Airline is 16.337.000 VND (or ~$815 USD).