Group One airline partners of Delta are Aeromexico, Air France, Alitalia, Gol and KLM, as well as Virgin Atlantic and Virgin Australia. Group Two Delta airline partners include Air Europa, Kenya Airways, Middle East Airlines, Saudia and Tarom.
Delta airlines also has Group Three and Group Four partner airline categories. Group Three partners include Aeroflot, Aerolineas Argentina, China Airlines, Czech and Garuda Indonesia. Group Four airline partners include Alaska, Great Lakes Airlines, Hawaiian, Korean Jet and Westjet. Skymiles members benefit when flying any one of these airlines.
Skymiles members who book flights on partner airlines ticketed by Delta earn miles based on the price of the flight. Members who book flights on partner airlines that are not ticketed by Delta earn miles based on the percentage of distance flown.
Members can redeem miles points for award travel, shopping, Sky Club memberships and upgrades. Delta SkyMiles credit card members can redeem miles to pay for travel. Members can also donate miles to various charitable organizations.
Delta created the SkyMiles program in 1981 as the Delta Air Lines Frequent Flyer Program. It became the SkyMiles program in 1985. There is a separate program that caters to small business called the SkyBonus program.