Founded in 1924, Delta Air Lines (DL) is one of the world's oldest operating airlines. It operates 13 hubs worldwide, the largest of which is located at Hartsfield–Jackson Atlanta International Airport (ATL). The airline flies to about 335 destinations worldwide throughout North America, South America, Europe, Africa, Asia and Oceania. A founding member of the SkyTeam alliance, Delta also has codeshare agreements with seven other airlines. The airline's fleet of 809 aircraft includes Airbus, Boeing and McDonnell Douglass planes. Depending on the aircraft, planes may include First Class, Business Class, Delta One (international Business Class), Delta Comfort (Premium Economy Class), Main Cabin (a form of Economy Class) or Basic Economy cabins.