If you’ve been using your Citi bank card more often for travel-related expenses, it may be time for an upgrade. The Citi Platinum Select/AAdvantage World MasterCard caters to travelers, with more of the services that you need. You’ll still enjoy the Identity Theft Solutions of your regular bank card while earning miles toward free air transportation. It really pays for frequent flyers to use a rewards program like AAdvantage. » Read more: Citi Advantage Credit Card