»»Delta Adds Fourth Tier to Its Frequent Flyer Program
In the effort to retain the loyalty of lucrative business travelers Delta Air Lines is introducing enhancements for its SkyMiles Medallion frequent-flier program.

First, members will have the ability to roll over excess elite Medallion qualification miles from one year to the next. For example, a member who earns 40,000 qualifying miles and reaches the 25,000-mile silver elite level, can roll over 15,000 miles to the following year.
For next year, Delta is also introducing a a fourth tier of elite status, the Diamond, for those with 125,000 qualifying miles or 140 segments flown annually.
It will offer the free Sky Club membership.
The biggest advantage is that Diamonds are ahead of Platinums for upgrades that are the main benefit for most elite frequent fliers.
