Originally Posted by GUWonder

If you have a NY/NJ/CT address on file as your primary AAdvantage address, AA will give you double miles on all flights on their planes flown until the end of the year. NYDBL is the promo code and it's a great promo that is good with other promos and elite status bonus.

This is just another way in which AA's program is much better than DL's program for those who fly 50k+ miles per year.