Originally Posted by
Flyertall
Why does my Million Miler balance go down when I redeem award miles? If the Million Miler balance is intended to be an accrual of only BIS miles, and is not an actual redeemable mile balance like SkyMiles are, why would my Million Miler balance deplete on par with the number of miles I spend for award redemptions?
They do not - that is impossible. Your Million Miler balance constantly grows over a lifetime as long as you fly DL/Partners. Million Miler miles do not deplete. If they do it is a DL IT fault. My Million Miler miles never go down, only up no matter how many rewards I redeem.