Yes, flying First Class on American Airlines often grants you lounge access, but it depends on the nature of your flight. If you are flying in Flagship First or Flagship Business on a qualifying international, transcontinental, or specific long-haul domestic route (like Hawaii from certain hubs), you receive complimentary access to the premium Flagship Lounge and, in some cases, Flagship First Dining. For standard Domestic First Class on shorter flights (e.g., Miami to New York), you generally do not receive lounge access unless you have a separate membership, qualifying elite status (like Platinum Pro or Executive Platinum on an international itinerary), or a specific premium credit card. However, if your domestic flight is a connecting leg of a larger qualifying international First Class ticket, you can use the Admirals Club during your layover. It is important to check the "Access" rules in the American Airlines app before your trip, as domestic-only First Class passengers without status are often surprised to find that their ticket alone does not open the door to the lounge.