About Delta Airlines Delta Airlines is a major American Airline which was founded in May, 1924 and started operations from June 17, 1929. The airline operates scheduled services to 326 destinations in 64 countries and six continents from its headquarter and main hub at the Hartsfield–Jackson Atlanta International Airport in Atlanta, Georgia. It is the sixth oldest airline in the world and U.S and the second-largest in terms of both revenue passenger-kilometres flown. Delta is one of the four founding members of the SkyTeam airline alliance, and operates joint ventures with: Air France-KLM and Alitalia; Virgin Atlantic; and Virgin Australia.