Yes, active-duty U.S. military personnel can access American Airlines Admirals Club lounges, but with specific conditions. To qualify for complimentary access, you must be traveling in uniform on a same-day flight that is both operated and marketed by American Airlines. You are required to present your valid military ID and your boarding pass at the lounge entrance. This benefit typically extends to the service member's immediate family (or up to two guests) traveling on the same itinerary. If you are traveling in civilian clothes, you generally do not receive complimentary access unless you have a separate membership, are flying in a qualifying international premium cabin, or hold a high-tier AAdvantage status. Some military-specific credit cards also offer lounge credits that can be used if you don't meet the "in uniform" requirement.