SuperShuttle offers a shared ride service to and from 36 airports, and this summer, you can get triple miles when you book a trip by Aug. 31, 2011. Partner airline programs include Delta SkyMiles, Frontier Airlines Early Returns, United Mileage Plus and US Airways Dividend Miles. For more information on this Summer Lifts promotion, visit http://www.supershuttle.com/summerlifts – Enter the code MILES when booking online or on any of SuperSuttle’s mobile application to receive your triple bonus miles. The normal earning rate is 50 miles, so with this offer you’ll earn 150 miles for each ride. This offer is not valid in Miami.