Accessing American Express airport lounges, particularly the premium Centurion Lounges, primarily requires holding a premium Amex card such as The Platinum Card®, The Business Platinum Card®, or the invitation-only Centurion® (Black) Card. To enter, you must present your physical card (or digital card in the Amex app), a government-issued ID, and a same-day boarding pass for a departing flight. You are generally allowed entry within 3 hours of your scheduled departure time, though this restriction is waived if you are on a connecting flight (layover). In 2026, guest access rules are strict: Platinum cardholders usually have to pay a guest fee (roughly $50 per adult) unless they meet high annual spending thresholds on their card. Beyond Centurion Lounges, these cards also grant access to the "Global Lounge Collection," which includes Delta Sky Clubs (when flying Delta), Escape Lounges, and a Priority Pass Select membership (which requires a separate, free activation) to access over 1,400 lounges worldwide.