Atlanta airport is the world’s busiest. When you look at the number of flights many of the other busiest airports drop down in the rankings, major international airports often have large widebodies dominating but fewer flights. Atlanta certainly sees its share of widebodies but is also a major domestic hub with narrowbodies and regional jets.
It turns out that Chicago O’Hare isn’t that far behind Atlanta when ranked by number of flights. And each airport’s construction plans tell us that the busiest title may be about the flip in the new few years.