Originally Posted by screwedbyaa

The rates that come up already include the AA BCD discount. You can test this by trying the same reservation without entering a BCD (you may need to clear your cache from cookies first). There should be a difference. However, from experience, the discount isn't the same for all vehicles and locations -- i.e., it's a crapshoot.

As for the two coupons you mentioned, you'll be asked to enter them at a later stage, but they are only for double and triple miles and have no effect on your rate.