The trade group said 95.4 million passengers flew in and out of Hartsfield-Jackson International Airport last year.
The second busiest U.S. airport last year was Chicago's O'Hare International with 66.3 million passengers followed by Los Angeles International with 63.7 million passengers.
The busiest travel hubs in the United States included Dallas/Fort Worth International, Denver International, John F. Kennedy International in New York City, San Francisco International, Charlotte Douglas International in North Carolina, McCarran International in Las Vegas and Sky Harbor International in Phoenix, Airport Council International said.
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