ΒΆ Freight Pilot
You must have your own plane.
Go to the Job Center to take the job. Once taken, the job marker will appear on your map. Go there.
Go to the "Freight Pilot" point on the map.
Click on "Hi, I want to start a new mission."
Cargoes will appear, and you'll need to load them into your plane.
Go to the airport marked on the map to deliver the cargo.
Unload the cargo using the NPC by selecting "Hey, I want to unload cargo," and then go to the NPC to complete the action "I've unloaded everything, here's the delivery note."