Air cargo, commonly known as air freight, is collected by firms from shippers and delivered to customers. Aircraft were first used for carrying mail as cargo in 1911. Eventually manufacturers started designing aircraft for other types of freight as well.
A consumer is  a person or organization that uses economic services or commodities. In economic systems consumers are utilities expressed in the decision to trade or not.
The consumer, so it is said, is the king ... each is a voter who uses his money as votes to get the things done that he wants done [Paul A. Samuelson Economics] Every man is a consumer, and ought to be a producer ... He is by constitution expensive, and needs to be rich [Ralph Waldo Emerson Wealth]