In 2026, the rules for accessing an American Airlines Admirals Club are quite strict: you generally cannot use the lounge if you are flying on a non-partner airline. To enter, you must present a boarding pass for same-day travel on a flight operated by American Airlines, a Oneworld alliance partner (like British Airways or Qatar Airways), or Aer Lingus. This applies whether you are a paid member, an executive credit card holder, or using a one-day pass. If you are flying on a competitor like Delta or United, your Admirals Club membership will not grant you access for that specific trip. There is one minor exception for lifetime members who joined decades ago under different terms, but for the vast majority of travelers, your lounge access is "tied" to your choice of airline for that day. This policy ensures that the lounges do not become overcrowded and remain a dedicated benefit for loyal American Airlines and Oneworld customers.