
No. 1 Hartsfield-Jackson Atlanta International Airport: The pride of Georgia reclaimed its title of world's busiest airport for passenger traffic in 2021, handling about 75.7 million people. Click through the gallery to see photos of the next nine busiest airports in the world in 2021.

No. 2 Dallas-Fort Worth International Airport: Travelers crowd the airport on November 20, 2021, ahead of the Thanksgiving travel rush. The airport saw around 62.5 million passengers in 2021.

No. 3 Denver International Airport: Travelers line up at a security checkpoint on December 26, 2021. US airports dominate the 2021 list thanks to a strong rebound in domestic flights.

No. 4 O'Hare International Airport: People walk through Chicago's O'Hare on April 26, 2021. Passenger traffic was up 75% from 2020.

No. 5 Los Angeles International Airport: People wait in line to check in for their flights in the international terminal on December 21, 2021. In the early weeks of the pandemic back in 2020, LAX saw a 95% drop in air travel, sending economic shock waves through the city.

No. 6 Charlotte Douglas International Airport: People walk through the B Concourse terminal at the airport of North Carolina's largest city on April 30, 2021. It saw roughly 43.3 million passengers.

No. 7 Orlando International Airport: Travelers wait in line for TSA security screening at the beginning of the July 4th holiday weekend in 2021.

No. 8 Guangzhou Baiyun International Airport: This was the world's busiest airport for passengers in 2020, when China's domestic market saw an earlier rebound than other countries. But Atlanta reclaimed its traditional No. 1 spot for 2021.

No. 9 Chengdu Shuangliu International Airport: Chengdu is a thriving city in China's central interior. If you're wondering why Beijing isn't in the top 10, it is now serviced by two major airports that split the traffic in and out of the capital city.

No. 10 Harry Reid International Airport: This busy gateway to Las Vegas got a name change in December 2021 to honor Nevada's longstanding US senator. For decades, it was called McCarran International Airport. It saw roughly 39.8 million passengers in 2021, up 79% from 2020.


