Launch your computer's Internet browser and go to "Expedia.com". Click the "Rewards" link near the top right hand side of the page.
Click the "ThankYou Rewards Network" link. Choose the "Get Rewards Program Details" link, located in the "Join Today" section. A page will display with details about the rewards program. Click "Join Today" to continue sign up.
Sign in to your Expedia account with your username and password. If you do not have an Expedia account, click the radio button next to "Create A New Account". Enter in your name, valid e-mail address and desired password, then click "Create Expedia Account."
Enroll in ThankYou rewards by entering in your valid home address and home phone number. Use the drop-down window to select a security question, then type in the answer in the "Answer" field.
Review the agreement and click "Complete Enrollment In ThankYou Network" to finish activating your rewards account.
