A4A may refer to:
*
Adam4Adam, a gay dating service
*
Airlines for America
Airlines for America (A4A), formerly known as Air Transport Association of America (ATA), is an American trade association and lobbying group based in Washington, D.C. that represents major North American airlines.
Profile
Mission
A4A ...
, an industry association in the United States
*
Apps4Africa, an African innovation accelerator
{{Letter-NumberCombDisambig