Delta Air Lines Inc. is a United States airline based and headquartered in Atlanta, Georgia. Delta operates an expansive domestic and international network, spanning North America, South America, Europe, Asia, Africa, the Middle East and the Caribbean. Delta has plans to initiate service to Sydney, Australia in July 2009, which will make it the only current American carrier to serve every continent, excluding Antarctica. Delta and its subsidiaries fly to over 375 destinations in 88 countries (excluding code share) across 5 continents. Delta is the only major U.S. carrier that flies to Africa.

Delta operates its largest hub at Hartsfield-Jackson Atlanta International Airport. It also maintains hubs at Cincinnati/Northern Kentucky International Airport, John F. Kennedy International Airport in New York City, and Salt Lake City International Airport.

Delta's Atlanta hub is the busiest airline hub in the world. Delta carries more passengers across the Atlantic than any other carrier worldwide. Its major transatlantic gateways are Atlanta, Cincinnati, and New York-JFK. Transatlantic service from Salt Lake City to Paris started in 2008, service from Pittsburgh to Paris will start in 2009, and service from Raleigh/Durham to Paris will start in 2010. Its major Latin American gateway is Atlanta.