The most trafficked airport in the USA is Hartsfield Jackson Atlanta International Airport.
Hartsfield Jackson Atlanta International Airport handles the most passengers and in the year of 2024 they processed and handled over 108 million passengers which makes it the busiest airport in the world by passenger count and passenger traffic.
Hartsfield Jackson Atlanta International Airport serves as the largest hub for Delta Air Lines, which is a major carrier.
And it's a key airport for the Atlanta metropolitan area and also serves as a gateway for many travelers that are connecting to other international and domestic destinations.
And the airport has also consistently been the busiest airport in the United States since the year of 1998.