$49 Dallas - Fort Worth Airport 15km Low-poly 3D model by CityArt. Available on CGTrader. Geometry: Polygon mesh. Check it out on CGHub.
C4D (Cinema 4D, filesize: 82 MB), OBJ (OBJ, filesize: 33.1 MB), FBX (Autodesk FBX, filesize: 22.9 MB), 3DS (3D Studio, filesize: 8.4 MB), DXF (DXF, filesize: 25.8 MB), STL (Stereolithography, filesize: 26.7 MB), 3DM (Rhinoceros 3D, filesize: 23.1 MB)