There are fast and slow ships in US shipping, and there are also fast and slow ships in air freight from china to usa. Did you know that? (The express flight here refers to the time limit from taking off to picking up the goods, not the flight time.)
According to different airlines, the process and timeliness of air freight from china to usa will also be different. For example, for the route to the Amazon warehouse in the United States and West, some airlines take 5-7 or 7-9 working days to enter the warehouse, and some take 2-3 working days to enter the warehouse. There is an inside story in this.

Air freight from china to usa is divided into direct flights and transfer flights, and there is a big difference between direct flights and transfer flights.
Domestic direct flight is faster and more stable, while transfer time is slower and less stable.
A direct flight from China to the United States usually takes 11-13 hours to land at an American airport - here is an example of Los Angeles Airport LAX. This kind of flight will definitely reach the United States faster, there will be no layovers, and there are relatively few unstable factors.
If you choose to transfer by air freight from china to usa, it will generally take 1-3 more working days to transfer from China to the United States. During the period, you need to transfer to another airport, take CA as an example. There is a flight to Beijing to the United States. The cargo needs to be transferred from this aircraft to another international aircraft, which will increase the number of work links, and coupled with other uncertain factors such as weather, mechanical failures, and aircraft delays, the timeliness may be delayed.