Access to the American Airlines Flagship® Lounge in 2026 is strictly reserved for high-tier elite members and those flying in premium cabins on specific routes. You can enter if you are flying in Flagship® First or Flagship® Business on a qualifying international or transcontinental flight (like JFK to LAX). Additionally, AAdvantage Platinum Pro® and Executive Platinum® members get access when traveling on any qualifying international flight, regardless of cabin. Unlike standard Admirals Clubs, you cannot "buy" a standard membership for the Flagship Lounge, though American occasionally offers Single Visit Passes for $150 (or 15,000 miles) if the lounge is not at capacity. For 2026 travelers, the "pro-tip" is that if you are a oneworld Emerald or Sapphire member from a foreign airline (like British Airways or Qantas), you can access the Flagship Lounge even on a domestic American Airlines flight, which is a significant "perk" that U.S.-based AAdvantage members do not receive unless they are flying internationally.