The Atlanta airport is still the busiest passenger airport in the world. Over 94.4 million passengers passed through Hartsfield-Jackson Atlanta International Airport in 2013. “Despite this challenging operating climate, worldwide traffic surpassed the 6 billion passenger mark in 2013,” said Gittens, the director general of the worlwide association of airports.. “This represents an enormous feat for the airport industry as we commemorate the 100th anniversary of commercial aviation in 2014.”

source/s: http://whnt.com/2014/09/17/hartsfield-jackson-atlanta-intl-airport-named-busiest-in-the-world/