The five largest airports in the world by area are: Beijing Daxing International (PKX) in Beijing, China, covering 46.6 km²; George Bush Intercontinental (IAH) in Houston, TX, United States, spanning 44.5 km²; Shanghai Pudong International (PVG) in Shanghai, China, with an area of 39.9 km²; and Cairo International (CAI) in Cairo, Egypt, measuring 36.3 km².