High Quality Content by WIKIPEDIA articles! The metropolitan area of London, England is served by six international airports and several smaller airports. Together, they make the busiest airport system in the world by passenger numbers and the second busiest by aircraft movements. In 2011, all six airports handled 133,709,327 passengers. The London airports handle 60% of all the United Kingdom`s air traffic. There are 14 domestic destinations served by the airports, and 396 international destinations.