The Discover it® Miles credit card will allow you earning miles on all your purchases. The earned miles can be redeemed for tickets with any airline (including Aeromexico), hotel stays, rental cars and even cash. The card does not have a sign up bonus but all miles you earn your first year will be matched at the end of the year (provided you are a new member). Also, the card has a chip technology and does not have a foreign transaction fee, so you can use this card abroad.
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All rates and fees, and other terms and conditions of the products mentioned in this article/post are actual as of the last update date but are subject to change. See the current products' Terms & Conditions on the issuing banks' websites.