$49 Modern Regional Airport Low-poly 3D model by Nuts3D. Available on CGTrader with 30260 polys and 25401 vertices. Check it out on CGHub.
OBJ (OBJ, filesize: 14 MB), 3DS (3D Studio, filesize: 2.36 MB), DAE (Collada, filesize: 10.2 MB), FBX (Autodesk FBX, filesize: 1.63 MB), MAX (Autodesk 3ds Max, filesize: 1.52 MB), TEXTURES (Textures, filesize: 60.2 MB)