Starting from the second stay that Marriott Rewards members make between Sept. 1 and Dec. 31, 2011, they will earn additional miles on top of the base miles they earn for their stay, up to a maximum 30,000 bonus airline miles. Participating airlines include Delta, GOL/Varig, LANPASS, Lufthansa and United. Your second stay will earn 1,000 bonus miles; third stay, 1,500 bonus miles; fourth stay, 1,500 bonus miles and fifth stay, 2,000 bonus miles, up to 30,000 bonus miles. Visit MarriottRewards.com/MoreStays-MoreMiles to register for the promotion.

Bottom line: Don’t forget to indicate that you want to earn miles for your Marriott stays instead of points if you want to take advantage of this offer.