From now through March 31, 2013, earn up to double MileagePlus miles when flying United’s daily non-stop flight from Washington Dulles International Airport to Dubai. The promotion coincides with Emirates’ new competing daily service on the same route. United is offering double miles for travel in its Global First and BusinessFirst cabins, as well as for full-fare economy tickets. Discounted economy tickets are eligible for a 50 percent bonus. The base flight mileage before bonuses from Washington Dulles to Dubai is 7,069 miles. Unfortunately, the bonus miles do not count toward elite status qualification. The bonus is available for itineraries connecting through Washington Dulles, but it is only based on the Dubai segment. You must register on United’s website before travel begins.