How to access Amex Centurion Lounges. To enter any Centurion Lounge, you'll need to have a same-day boarding pass. You can only access these lounges before you fly or during a layover if you have a connecting flight.
You can also get free or discounted Admirals Club access with a number of American Express cards that offer airline fee credits. If American Airlines is selected as your preferred airline, then the purchase of an Admirals Club membership or day pass will qualify for the credit.
Access is guaranteed only for active duty service members and their dependents, as per USO policy; however, others such as retirees, disabled veterans, and DoD employees may also be welcomed at some locations.
While Admirals Clubs offer plenty of great facilities to make flying more relaxing and refreshing, Flagship Lounges are also a great way to experience flying. Flagship Lounges offer many of the benefits of Admiral Clubs plus a few extras, including: Premium wine. Specialty cocktails.