American Express is offering triple points to members who charge airfare to an eligible American Express card through Sept. 30, 2010. U.S. cardmembers of a Green, Gold, Platinum or Centurion charge card (not including Premier Rewards Gold Card members) who are enrolled in the Membership Rewards program will earn one point plus two bonus points per $1 spent on all airfare purchases made by Sept. 30, 2010. Registration is required online at www.americanexpress.com/fly3x or by calling (800) 794-1308 and mentioning promo code 17677001. Only cards enrolled in the Membership Rewards program and registered for the promotion will earn triple points and you can earn up to 15,000 bonus points during the promotion. For more information and to view all of the American Express charge cards eligible, visit http://www.americanexpress.com/fly3x