US Airways Dividend Miles members who make reservations at usairways.com by Oct. 31, 2013, and pay with a MasterCard, can receive 250 bonus miles per booking. Reservations eligible for the booking bonus include all flights with at least one segment on US Airways or US Airways Express for travel through Dec. 31, 2013. Online registration for the bonus offer is required at http://usairways.com/MCDM prior to making reservations. You can use any MasterCard to pay for your flight and there is no limit to the number of bonus miles you can earn with this promotion. Miles will post to your account six to eight weeks after travel has been completed.