Dividend Miles members who use their MasterCard to book US Airways flights can receive DOUBLE MILES. Flights must be booked by the end of October for travel by the end of the year. Any regular MasterCard can be used to get double base miles & a Dividend Miles MasterCard will earn you double Preferred-qualifying miles. Must book through USAirways.com with a registered account. Bonus miles will be awarded 6-8 weeks after travel.