US Airways no longer accepts cash for in-flight purchases on domestic flights (except on US Airways Express)
US Airways - April 2010 - You may now only use credit or debit cards to shop from the MarketPlace Menu on US Airways flights within North America (including Canada, Mexico and the Caribbean). It seems that this rule includes non-complimentary beverages as well. US Airways will continue to accept cash, credit and debit cards on flights between the U.S. and Europe, the Middle East and South America. To keep things confusing, only cash is accepted on US Airways Express.
