Vietnam Airlines from Shanghai to Phnom Penh has 3 flights every day. And there are 21 flights per week flying out of Shanghai which connect to Phnom Penh.
The price for economy class – one way ticket of Vietnam Airlines from Shanghai to Phnom Penh is 9.073.000 VND (or ~$452 USD) and the price for bussiness class – one way ticket of Vietnam Airline is 11.121.000 VND (or ~$554 USD).