Customers must book July 7 - August 5 for travel July 7 – September 30, 2012 to earn double miles on itineraries starting or ending at Reagan National Airport (DCA). Bonus is awarded on consecutive flights, as long as the origin or destination is DCA. Customers with itineraries connecting through Reagan National Airport (DCA) are not eligible for bonus miles. Any itinerary with a Reagan National Airport (DCA) arrival followed by a Reagan National Airport (DCA) departure the same day is considered a connection. For example, if you fly from Washington, DC (DCA) to Phoenix to San Diego, you’ll earn bonus miles on both flights. But if you fly from Norfolk to Washington, DC (DCA) to San Diego, you will not earn bonus miles. Bonus is earned on base flight miles only on flights operated by US Airways or US Airways Express; miles do not count toward Preferred status. US Airways will award bonus miles one to two weeks after travel has been completed. All Dividend Miles terms and conditions apply.