American is celebrating Qantas’ 90th birthday by awarding double miles (not elite qualifying) for all flights down under in March/April/May, 2011.The promotion doesn’t start until November 10th, but if you are thinking about booking a trip, you should probably hold off.Promo link (not live yet, so don’t panic when it doesn’t accept your registration).“Bonus Code:QF90Y(Register by selecting the red “REGISTER” button below.)Dates:Book your trip between November 10, 2010, and January 31, 2011 (dates inclusive).Travel between March 1, 2011, and May 31, 2011 (dates inclusive).Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.In celebration of Qantas’ 90th Anniversary, AAdvantage members can earn double miles when traveling on a qualifying ticket on any Qantas Airways or American Airlines flight number between the US and Australia or New Zealand during March, April and May 2011.For every trip you take during the promotion period, you can earn double miles. Just book your trips before January 31, 2011 and register before travel. The extra miles you can earn are in addition to your standard base miles and class of service bonus.Offer valid for residents of the US and Canada.