Yes, you can use the American Airlines Admirals Club when flying Alaska Airlines, but access depends on your membership or status. In 2026, because both airlines are members of the oneworld alliance, Admirals Club members can access the lounges when departing or arriving on same-day flights operated by either American or Alaska. Additionally, if you have oneworld Emerald or Sapphire status (earned through Alaska’s MVP Gold or higher), you may have access on international itineraries. However, it is important to note that a standard Admirals Club membership does not usually grant access if you are flying Alaska on a purely domestic route unless you have a specific credit card benefit or a paid lounge membership. Always check the latest reciprocity rules on the American Airlines app, as lounge capacity restrictions can occasionally limit entry for non-membership holders.