What are the largest airports in the world?

The largest airport on the planet by area is King Fahd International, located near Dammam, on Saudi Arabia's east coast. It covers about 776 square kilometers, far above any other airport in the world: its size comes from a huge strip of land reserved around the runways when the complex was planned in the late 1980s, with room for growth meant to last decades. Much of that land remains undeveloped today. Despite its extent, it handles a passenger traffic that is modest compared with airports far smaller in area, because size and passenger numbers are two measures that don't go hand in hand: what takes up space is not the terminals, but the runways, taxiways and safety buffers around them.

The second-largest airport by area is Denver International, in Colorado, at about 137 square kilometers, more than six times the area of New York's JFK, which is around 21. Next come other large US complexes, such as Dallas/Fort Worth or Orlando, in a country with many airports built with ample room for expansion from the start. This list does not match the list of busiest airports, which Atlanta leads by passenger numbers with a far smaller area than Denver. By area, nearly all giant airports share the same explanation: they were built on cheap, abundant land, far from the centers of the cities they serve, and they hold onto land reserves for runways that may never be built (as of September 2026).