Hartsfield-Jackson had its busiest day on record earlier this year on the Monday after the Super Bowl in Atlanta, when nearly 102,000 passengers were screened at ATL and security wait times were up to 2 hours long.
Selden said the airport has “capacity to grow.”
However, during some periods it can feel as if the world's busiest airport is bursting at the seams. Security lines during busy holiday periods can stretch through the terminal and into baggage claim with waits of 45 minutes or longer. Customs and Border Protection waits can also be lengthy.
Hartsfield-Jackson has plans to expand the South security checkpoint at the domestic terminal, which will open more capacity to handle the tens of thousands of passengers passing through each day.
“Airports across North America continue to experience record-setting growth, further demonstrating the dire need for airport infrastructure improvements,” said Airports Council International - North America CEO Kevin Burke in a written statement.
Fitch Ratings issued a report Monday saying volumes of passengers boarding planes at U.S. airports are at their highest in more than a decade. The total count of passengers boarding planes reached 1 billion in 2018, up nearly 5 percent from 2017, according to Fitch.
Traffic at small and medium-sized hubs has grown faster in recent years as ultra low-cost carriers Spirit, Frontier and Allegiant expand, though that growth “is more uncertain” than for legacy carriers, according to Fitch Ratings director Jeffrey Lack in a written statement.