Which organization is known as the oldest and largest airline trade association in the U.S.?

Airlines for America (A4A) is indeed recognized as the oldest and largest airline trade association in the United States. Established in 1933 as the Air Transport Association of America (ATA), it has played a significant role in advocating for the policies and interests of major U.S. airlines. A4A focuses on a wide range of issues that affect the airline industry, including regulatory policies, air travel safety, and economic competitiveness. Its extensive histories and deep connections within the industry enable it to be a leading voice representing the airline sector on critical matters.

The other organizations listed have distinct focuses: the International Air Transport Association (IATA) primarily represents global airlines, the Air Line Pilots Association (ALPA) focuses on the professional interests of pilots, and the National Business Aviation Association (NBAA) serves the needs of business aviation. While all these organizations contribute significantly to the aviation industry, none matches A4A’s historical significance and size when specifically considering airline trade associations in the U.S.