The Delta Airlines Frequent Flyer Miles policy contains the rules, terms and conditions of Delta's SkyMiles program. Under the SkyMiles frequent flyer program, members earn 'miles' or reward points for traveling on Delta flights or spending money with their affiliate partners. The SkyMiles program also now incorporates Northwest Airlines WorldPerks program, since the two commercial airlines merged in October 2009.

SkyMiles members can earn miles by flying on eligible Delta flights or Delta's SkyMile partner flights. Miles can also be earned by utilizing the services of their affiliates, like Hilton Hotels, Neiman Marcus, Shutterfly.com or Netflix.http://www.delta.com/skymiles/index.jsp The miles can then be redeemed for airline tickets, car rentals, hotel stays or for merchandise in the Delta SkyMiles Marketplace.https://marketplace.delta.com/

The Delta frequent flyer miles policy covers the rules regarding milage expiration, conditions of enrollment, information on the rules regarding the sales or barter of miles and details related to earning miles through the program. This page serves as a resource for finding the latest information about the Delta SkyMiles program and links to the latest news regarding Delta's frequent flyer miles policy changes and amendments.http://www.delta.com/skymiles/about_skymiles/membership_guide_program/skymiles_rules/index.jsp

The Delta Airlines frequent flyer miles policy can be found in full on Delta.com/Skymiles under the About SkyMiles/Mileage Credit Rules and Conditions tab. The policy states that mileage points will be rewarded for the purchase of qualified flights. Flights that don't qualify for miles include free tickets, like the ones earned with prior SkyMiles, or tickets purchased at a discount like those offered on websites like Priceline.com or Hotwire.com.http://www.delta.com/skymiles/about_skymiles/membership_guide_program/mileage_credit_rules/index.jsp

Delta frequent flyer miles can be lost and accounts can be deactivated if the member does not keep their account active for 12 consecutive months. The policy states that the miles will not expire if the member conducts at least one transaction (either earning or redeeming miles) in a two year time period.http://www.delta.com/skymiles/about_skymiles/membership_guide_program/skymiles_rules/index.jsp