Simply register up to three of your credit cards and you can earn up to five Mileage Plus miles per dollar whenever you use these cards to shop with participating retail, catalog, and E-commerce merchants. Your Mileage Plus Shopping miles will be credited automatically to your Mileage Plus account.
Enrollment is absolutely free.
As a special introductory offer, earn 1,000 bonus miles for your first two separate purchases made within 60 days of registration. Click here for further information or to enroll.