Go to the Web site for your air-miles account you want to check. (see Resources 1 and 2)
Log into your air-miles account with your user name and password. If you have forgotten your password, click on the forgotten-password link to get a reminder and reset the password sent to your email address.
Call the customer-service number for your airline and ask for the balance of your air-miles account. Airline Contact Information is a Web site (see Resources 3) that has contact information for all airlines.
Create a free account at Points.com and enter all your frequent-flier account numbers. Points.com is a Web site where you can manage all of your points-earning accounts in one place. Log into the account at any time to view the balances of all of your accounts.