based on General Goods, it may cost USD2-7 per kg.
The price depends on the weight of cargo, the airline you choose and the transit times you want.
Normally , air freight from China to US by MU Airline,HU Airline and CA Airline will cost less.
And if by other airline service, would cost much.
If you need an air freight quotation, welcome to send email to email@example.com.