According to Delta Airlines - "SkyMiles helps you save time and money in all kinds of ways, from travel to telecommunications."
SkyMiles
phone 800-323-2323
Some of the features of Skymiles (from Delta Airlines) -
Delta's SkyMiles members can book Award Travel with the ability to combine Coach, First Class/BusinessElite, SkySaver and SkyChoice travel into one ticket and save thousands of miles.
"As an example, a member who travels from Atlanta to London in a SkyChoice BusinessElite seat and returns from London to Atlanta in a SkySaver Coach seat may now redeem 150,000 miles versus the previously-required 250,000 miles for the same itinerary. Or, a member can fly from New York to Los Angeles in a SkySaver First Class seat and return in a SkySaver Coach seat for 35,000 miles, which previously would have required 45,000 miles."
For bookings, these are a few of the features offered to Delta frequent flyers: "
An online calendar of availability at delta.com that allows members to shop for Award seats
Delta Messenger upgrades notification, a tool that will automatically contact Medallion members when their complimentary upgrade has cleared. Or, if a Medallion member is still awaiting an upgrade to clear, Delta will automatically add the member to the airport standby list upon check-in
Additionally, the program recently implemented technology to automatically request an upgrade for Medallion members -- Delta's most frequent flyers -- when they make an eligible reservation at delta.com, with Delta reservations, or with a travel agent."
"The award-winning Delta SkyMiles program offers members multiple mileage-earning opportunities when flying Delta, Delta Shuttle(r), the Delta Connection(r) carriers, Delta AirElite(r) and other SkyTeam(r) airlines. Additional mileage-building opportunities are offered through more than 100 partners such as the Delta SkyMiles Credit Card from American Express, SkyMilesShopping.com, participating hotels, car rental companies, telecommunication services, restaurants, retailers and more."