Other things to look for are how many
miles you need before you
qualify for a free plane ticket, if there is a cap on points that can be earned
annually and whether or not unused airline
miles expire.
Delta flyers who want to reach SkyMiles» ultra-elite Diamond Medallion status have to fly 125,000
qualifying miles or 140 segments annually, and they have to rack up at least $ 15,000 in spending (i.e., Medallion Qualifying Dollars or MQDs) on Delta and its
qualifying miles or 140 segments
annually, and they have to rack up at least $ 15,000 in spending (i.e., Medallion
Qualifying Dollars or MQDs) on Delta and its
Qualifying Dollars or MQDs) on Delta and its partners.