VIS Games This package contains 13 different airport building like passenger terminal, cargo terminal, tower, warehouses and hangars.A fuel-station is also included.
Just drag the prefabs into your scene and arrange them as you like.You may also want to have a look at the example scene that contains all the prefabs.Textures-sizes between 512x512 to 2048x2048.
The original FBX-file is also included in the package.