Renting from Avis over the holidays? I know I am, and I’ll be picking up some bonus AAdvantage miles along the way. Avis has teamed up with American AAdvantage to offer savings of up to 35 percent and up to 3,000 bonus miles too! Rent from Avis for 2 or more consecutive days and use AWD number K817186 and coupon code MUAA077. This offer is good now through December 31, 2014. Bonus miles vary depending on the length of the rental.