United States of America
Capital: Washington, D.C.
Population estimate, 2015: 321.77 m.
GNI per capita, 2014: (PPP$) 52,947
HDI/world rank, 2014: 0.915/8
Internet domain extension: .us
The busiest airport in 2011 was Atlanta (Hartsfield–Jackson), which handled 92,389,023 passengers. There were 23 airports with more than 10 m. enplanements in 2013. The leading airports in 2010 on the basis of aircraft departures completed were Atlanta Hartsfield–Jackson (465,000); Chicago O’Hare (426,600); Dallas/Fort Worth (315,100). In 2011 Delta Air Lines carried the most scheduled passengers of any airline in the world with 163,838,000, ahead of United Airlines, with 141,799,000, and the low-cost carrier Southwest Airlines, with 135,274,000. Delta Airlines carried the most international passengers of any US carrier in 2010, with 21,029,000 (ranking it eighth in the world for international passengers carried). In 2015 US flag carriers in scheduled service enplaned 798.4 m. revenue passengers.