Vietnam Airlines from Melbourne to Phnom Penh has 3 flights every day. And there are 9 flights per week flying out of Melbourne which connect to Phnom Penh.
The price for economy class – one way ticket of Vietnam Airlines from Melbourne to Phnom Penh is 15.480.000 VND (or ~$772 USD) and the price for bussiness class – one way ticket of Vietnam Airline is 24.840.000 VND (or ~$1240 USD).