Delta Airline is a major American Airline company headquartered in Atlanta, Georgia, United States. Both domestic and international flights are operated by it. It provides air services for all continents except Antarctica. Delta and its subsidiaries operate about 5000 flights on daily basis. About 80,000 work for this airline. The main hub of this airline is situated at Hartsfield-Jackson Atlanta International Airport, which is the busiest airport in terms of number of passengers. Every year 91 million passengers travel from this airport. It is the sixth oldest airline in entire world as well as oldest airline in United States which is still operating in spite of being old. It is one of the founding members of Sky Team which is alliance of various other airlines companies. The other members of Sky Team are Korean Air, Air France and Aeromexico. These four members have code share agreement with each other.