United Airlines has a new app and if you play one of the Optathlon Games by Oct. 15, 2010, you will be entered into a sweepstakes to win 1,000,000 Mileage Plus miles. Players can also win instant win Travel Options prizes, such as a pass to the Red Carpet Club, Premier Line or Economy Plus or a 10 percent e-certificate that can be used on a future flight booked at united.com. Two of United’s five games can be accessed on an Android or iPhone–Leg Room Legend and Line Jump Hero. You can also visit http://www.optathlon.com and play the games online. The sweepstakes to win 1,000,000 miles is only open to residents of the U.S. and you will be automatically entered after playing at least one of the five Optathlon games. To win an instant prize, you must play all five games if you access the games via the Web site. If you play via a mobile device, you only have to play the two games for a chance to win.