Delta Airlines allows passengers to bring their own alcohol on board, but there are specific guidelines to follow. Passengers may carry alcohol in their carry-on baggage if it is in containers of 3.4 ounces (100 milliliters) or smaller, following the Transportation Security Administration regulations for liquids. If guests purchase alcohol at the airport, there is no limit as long as it is packed properly and remains sealed until consumed on board.
However, it is important to note that Delta Airlines prohibits consumption of personal alcohol during the flight, unless it has been served by the flight attendants. It is wise to review Delta's official website for any updates or additional policies regarding alcohol and to understand the regulations associated with traveling with alcohol on flights.