It is no doubt that air shipment is much fastest than sea freight. There are 2 ways of air shipment: Air Express and Air Freight.
Air express, also referred as “air courier”, is door to door service provided by companies such as DHL, UPS, and FedEx. The package is delivered in shorter time (e.g. 2-3 days) from the pick-up point (such as your factory) to a designated address (such as Amazon FBA warehouse).
Air freights, also referred as the “air cargo”, are normally larger shipments which are delivered from airport to airport. Compared to the door to door service of air courier, you have to spend extra time in cusotm clearance and picking up the package from the airport.