A new promotion from Delta: http://dmn.delta.com/ace_offers/summermobile/ EARN 1,000 MILES WHEN YOU CHECK IN USING THE DELTA APP THIS SUMMER. Let the convenience of app check-in earn you bonus miles. First register, then check in using the Delta app to earn 1,000 miles between June 30 and September 7, 2011. The Delta app allows you to get your eBoarding Pass right on your mobile device, bypassing printers and airport congestion. You can store your boarding pass on your phone like a picture, making it easily accessible even without an Internet connection. You’ll be free to make your way through the airport and present the boarding pass image directly from your phone as you go through security and the boarding gate. Try app check-in today for a faster, more convenient traveling experience.