King Fahd International Airport in Saudi Arabia is by far the largest airport in the world in terms of area. Occupying an area of nearly 780 square km, according to some reports, this airport itself is bigger than even it’s neighbouring country Bahrain. However, the entire area has not been utilised yet. Saudi Arabia has another very large-area airport named King Khalid International Airport which stretches over an area of about 250 square km.
The busiest airport in the world in terms of passenger traffic is the Hartsfield International Airport in Atlanta, USA. It’s traffic volume stood at over 92 millions in 2011, way above the rest. In terms of international passenger traffic volume London’s Heathrow airport still tops the chart. However, the Beijing Daxing International Airport in Beijing, China, expected to be completed in 2015, would reportedly topple Atlanta airport as the busiest one with a passenger traffic volume of 120 to 200 million.