The world’s busiest airport is defined in three ways: by traffic movements, passenger traffic and cargo traffic. All three lists are given below.
Airports by Cargo Traffic (Cargo is in Metric Tonnes)
Number one is Memphis International Airport in Memphis, Tennessee, United States. The cargo is 3,697,054. Number two is Hong Kong International Airport in Chek Lap Kok, Hong Kong. The total cargo is 3,385,313.
At number three is Shanghai Pudong International Airport in Pudong, Shanghai, People's Republic of China. The total cargo is 2,543,394. At number four is Incheon International Airport in Incheon, Seoul National Capital Area, South Korea. The total cargo is 2,313,001.
Paris-Charles de Gaulle Airport is at number five. The total cargo is 2,054,515. It is in Seine-et-Marne/Seine-Saint-Denis/Val-d'Oise, Île-de-France, France. At number six is Ted Stevens Anchorage International Airport in Anchorage, Alaska, United States. The total cargo is 1,994,629.
World’s Busiest Airport by Passenger Traffic (for 2010)
At number one is Hartsfield–Jackson Atlanta International Airport in Atlanta, Georgia, United States. The total passengers are 59,790,608. At number two is Beijing Capital International Airport in Chaoyang, Beijing, China. The total passengers are 48,912,712.
At number three is O'Hare International Airport in Chicago, Illinois, United States. The passenger total is 44,576,625. At number four is London Heathrow Airport in Hillingdon, Greater London, England, United Kingdom. The total passenger number is 43,484,496.
Tokyo International Airport in Ota, Tokyo, Japan is number five. The total passengers are 42,006,407. At number six is Los Angeles International Airport in Los Angeles, California, United States. The total passengers number 39,502,735.
Airports by Traffic Movements (for 2009)
At number one was Hartsfield–Jackson Atlanta International Airport in Atlanta, Georgia, United States. The total traffic movement was 970,235. At number two was O'Hare International Airport in Chicago, Illinois, United States. The total traffic movement was 827,899.
Dallas/Fort Worth International Airport in Dallas/Fort Worth, Texas, United States is at number three. The total traffic movement was 638,782. At number four was Los Angeles International Airport in Los Angeles, California, United States. The traffic movement was 634,383.
Denver International Airport in Denver, Colorado, United States was at number five. The total traffic movement was 607,019. At number six was Charlotte/Douglas International Airport in Charlotte, North Carolina, United States. The total was 509,448.
When trying to determine the world’s busiest airport, it is essential that you get all the pertinent statistics. This can change as traffic, air cargo and passenger volume change.