US Airways Dividend Miles members can earn double miles on all flights anywhere US Airways flies if you book your ticket with a US Airways MasterCard. Book a flight with any MasterCard and you’ll earn a 50 percent bonus. Registration is required prior to booking at http://www.insideflyer.com/link/?3124 – Book your ticket with a MasterCard or US Airways MasterCard by Dec. 15, 2010 for travel through Dec. 15, 2010 and you’ll receive either 50 percent or 100 percent bonus miles. Bonus miles do not count toward Preferred status. The offer is valid for reservations made on usairways.com only.