List of busiest airports by passenger traffic

The world's busiest airport is Hartsfield–Jackson Atlanta International Airport in metropolitan Atlanta, Georgia, which has been the world's busiest airport every year since 1998 with the exception of 2020, when its passenger traffic dipped for a year due to travel restrictions resulting from the COVID-19 pandemic. Atlanta regained the top position in 2021, and has held it since. Alternatively, London has the world's busiest city airport system by passenger count.

As of 2025, the United States has the most airports in the top 50 list, with 14 (15 in 2024), following by China having 12 (same as in 2024), while India, Spain and Turkey have two. In terms of regions, North America has 15 airports in the top 50 (17 in 2024), along with East Asia also with 15 (14 in 2024), Europe with 8 (same as in 2024), Southeast Asia with 5 (same as in 2024), West Asia with 4 (3 in 2024), South Asia with 2 (same as 2024), and South America with 1 (same as 2024).