#1. Hartsfield-Jackson Atlanta International Airport

Last year the airport served 101,449,106 passengers. It is the busiest airport in the world in terms of take-offs and landings as well. The airport is huge and it has 207 gates. Hartsfield–Jackson accommodates international flights to North America, South America, Europe, Asia, and Africa.

#2. Beijing Capital International Airport

The airport's passenger traffic amounted to 89,938,628 people in 2015. It serves as a hub for Air China, which flies to over 120 destinations. Hainan Airlines and China Southern Airlines also use the airport as a hub. Beijing Capital has three terminal buildings. Terminal 1 is the operational base for Hainan Airlines. Terminal 2 houses China Southern Airlines and other airlines. Terminal 3 houses Air China and other domestic and international flights.

#3. Dubai International Airport

The airport handled 78,010,265 passengers last year. The airport has total capacity of 90 million passengers annually. The cargo terminal is capable of handling 3 million tons of cargo annually. The airport serves as the operational base for Emirates, a state-owned airline. Dubai International Airport is one of the main destinations for regular flights operated by Singapore Airlines, Yemenia, Biman Bangladesh Airlines, and others.

#4. Chicago O'Hare International Airport

The airport served 76,949,504 passengers in 2015. It is a major hub for United Airlines and the second largest hub for American Airlines. O'Hare was ranked one of the least punctual airports in the United States. High volume of flights and heavy schedule lead to long delays and cancellations. The airport consists of four terminals. The main airlines operating at the airport are United Airlines and United Express.

#5. Tokyo International Airport (Haneda Airport)

The airport handled 75,316,718 passengers last year. The airport accommodates almost all domestic flights. International service at Haneda Airport has expanded due to charter flights to Seoul, Shanghai, and Hong-Kong. The airport is used as a major hub by Japan Airlines and All Nippon Airways.

#6. London Heathrow Airport

Last year, 74,989,795 passengers travelled via the airport. It has five passenger terminals and a cargo terminal. A characteristic feature of Heathrow Airport is that it is low-lying, at 25 meters above sea level. As the airport is located west of London and as its runways run east-west, an airliner's landing approach is usually directly over the city.

#7. Los Angeles International Airport

In 2015, the airport handled 74,937,004 passengers, an increase of 6% from the previous year. It serves as a hub for Air New Zealand, Alaska Airlines, Allegiant Air, and others. There are four runways at the airport. Los Angeles Airport has nine terminals arranged in a shape of a horseshoe. The airport has connections to North America, Latin America, the Middle East, Europe, Asia, and Oceania.