Delta Air Lines, Inc., operating as Delta Air Lines, is a major American airline, headquartered in Atlanta, Georgia. The airline operates an extensive domestic and international network serving six continents. Delta Air Lines and its subsidiaries operate over 5,000 flights every day and have approximately 80,000 employees. The airline's hub at Hartsfield-Jackson Atlanta International Airport is the world's busiest airport by passenger traffic (over 91 million passengers per year) and number of landings and takeoffs; it is also home to Delta's Technical Operations Center. Delta is the sixth-oldest operating airline by foundation date, and the oldest airline still operating in the United States. Delta Air Lines is one of the four founding members of the SkyTeam airline alliance, and scheduled passenger traffic in 2012, and the second-largest in terms of revenue passenger-kilometers flown in 2012. Regional service for the airline is served by Delta Connection.
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