Sign in to your Mileage Plan Dining account, then:
- Click on the “Linked Cards” tab.
- Find the “Link more cards” section near the bottom of the page, enter the card number you’d like to add, then click “Link card.”
- Under Account Center, tap “Linked Cards.”
- Find the “Link more cards” section near the bottom of the page, enter the card number you’d like to add, then tap “Link card.”