Originally Posted by
s1c3r1a1b3b3l1e1
But, can anyone help me with RDM? What does that stand for?
Most people on FlyerTalk use that term to refer to "Redeemable Miles". These include all miles you earn for flights including elite bonuses, credit card miles, SuperSize miles, basically anything that is a mile that goes into your WorldPerks account that you are able to
redeem for an award is considered an RDM.
As a practical example, as a NW Gold Elite, you earn 100% bonus miles on all NW flights. So, a roundtrip flight from MSP-ORD-MSP would earn you 1000 base miles (500 miles each leg), but also 1000 elite bonus miles (at the 100% level for being Gold Elite). So, in total, your trip would have earned you 2000 RDMs.
Hope this helps.