American Airlines' Flagship Lounges sit a tier above the everyday Admirals Club, and they're the carrier's answer to Delta One Lounges and United Polaris Lounges. The difference? Access rules are noticeably more forgiving, which makes them worth knowing about if you're flying long haul on American or any oneworld airline.

There are six locations right now: Chicago O'Hare (Terminal 3, concourses H/K), Dallas Fort Worth (Terminal D, gates D21-D22), Los Angeles (Terminal 4, near gate 40), Miami (Concourse D, near gate 30), Philadelphia (A-West, gates A15-A16), and New York JFK, where the lounge has been rebranded the Greenwich Lounge after American and British Airways co-located in Terminal 8. Miami's is the biggest at around 29,000 square feet; Philadelphia's is the smallest but the newest, and the only one with the updated design. Charlotte and a replacement Miami lounge are in the pipeline, with no opening dates yet.

Inside, expect shower suites, a hot and cold buffet, QR-code ordering for some a la carte dishes, a cheese cart, Lavazza coffee, and self-serve liquor — with Bollinger champagne on the pour. Two locations (Dallas and Miami) also house Flagship Dining, a sit-down, four-course, table-service restaurant within the lounge. An L.A. version is slated for later in 2026. Flagship Dining is first come, first served, and open to anyone who got into the lounge on a Flagship Business ticket for a qualifying long haul, transcontinental, or Hawaii flight.

So who gets in? Several routes: oneworld Sapphire and Emerald members can enter with one guest — and if your status comes from a non-US program (think British Airways or Qantas), you can use it on any same-day oneworld flight, even domestic. Status earned through American AAdvantage or Alaska only works on qualifying international itineraries, though connections count. First and business class passengers on qualifying oneworld routes get in too — business travellers with no guests, first class with one. Qualifying routes include US flights to Europe, Asia, South America (with some exclusions) and Oceania, plus a quirky list of premium transcontinental and Hawaii routes like JFK-LAX, LAX-Boston on the A321T, and Dallas-Honolulu. Concierge Key members can use the lounges on any same-day oneworld flight and bring two guests.

No status or premium ticket? You can buy in for $150 or 15,000 AAdvantage miles if you're flying American or oneworld that day — honestly only worth it for a long layover.

For travellers, the takeaway is this: American's premium lounges may trail Delta's and United's in polish, but they're easier to get into, especially if you hold oneworld status with a foreign program. If you're connecting through Miami, Dallas, or JFK on an international itinerary, check your eligibility before defaulting to an Admirals Club — the food and showers are a real step up.