If AA is the model for "million milers," I've accumulated more than a million Delta Skymiles since joining the program for my honeymoon flight in 1993. But I've spent a lot of those miles, too, and quite a few of them were either status bonuses or credit card miles or other bonuses. Delta's "million miler" program requires a million flown miles (or at least it does now -- during the early part of my Skymiles membership, it counted elite bonus miles as well. But in that progam I'm still just under 500,000.