Chip Lupo, Credit Card Writer
@CLoop
You can log in to your American Airlines AAdvantage® MileUp® account by going to the login page on the Citibank website or mobile app and entering your username and password in the appropriate fields. Then, click the “Sign On” to access your online account.
How to Register for Online Access on your AAdvantage MileUp Card Account
- Register your AAdvantage MileUp Card for online account access. Click “Register for Online Access” and enter your card number, birthdate and the last 4 digits of your Social Security number or Tax ID number to verify your credit card account.
- Choose your AAdvantage MileUp Card username and password. The username must be between 5 and 50 characters, including special characters, but no spaces. The password must contain from 6 to 50 characters and have at least one letter and one number, different from your password, and no more than two consecutive identical characters. The password is not case sensitive and may contain special characters.
- Log in with your new AAdvantage MileUp Card credentials. From the login page on the Citibank website or mobile app for iOS and Android, fill out the User ID and Password fields using your new credentials, and click “Sign On” to access your account.
After you have signed up and logged in, you’ll be able to manage your AAdvantage MileUp Card account online. You can pay your credit card bill, see credit card statements, monitor account activity, and change account information such as passwords and automatic payments.
If you forget your login information, click “Forgot Password?” on the Citibank login page. Then, just follow the prompts to reset or retrieve your username or password.

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