AAL or Aal may refer to:
Arts and entertainment
- Aal (film), a 2014 Tamil thriller
- Against All Logic, pseudonym of musician Nicolas Jaar (born 1990)
- Animals as Leaders, a progressive metal band (formed 2007)
- Arjen Anthony Lucassen (born 1960), Dutch musician
- Johannes Aal (1553), Swiss Roman Catholic composer and dramaturg
Aviation
- Above aerodrome level, an altitude relative to the nearest aerodrome
- American Airlines, ICAO airline designator AAL
- Adelaide Airport Limited, owners of the Adelaide Airport
- Australian Air League, Australian Air Cadet Organisation
- Aalborg Airport in North Jutland Region, Denmark, IATA airport code AAL
Finance and law
- Aid Association for Lutherans, one of the companies that formed Thrivent Financial for Lutherans in 2002
- Attorney at law
- Australian Academy of Law
- Anglo American plc, a British multinational mining corporation (London Stock Exchange symbol AAL)
- American Airlines Group, parent company of American Airlines (NASDAQ symbol AAL)
Places
- Aal (Kocher), a river in Aalen, Germany
- Ål, Buskerud, Norway
Politics
- Aborigines Advancement League, an Aboriginal organisation in Melbourne
- Aborigines' Advancement League of South Australia, usually AALSA but often referred to as AAL within the state
- Australian Aborigines' League, a precursor to the Victorian Aborigines Advancement League (now Aborigines Advancement League, see above)
Science, technology and mathematics
- Abstract algebraic logic, in mathematics
- ATM Adaptation Layers, to compute information transfer
- Automated Anatomical Labeling, a digital atlas of the human brain
Other uses
- Aal, a reddish dye from the roots of the East Indian mulberry shrubs Morinda citrifolia and Morinda tinctoria
- Anterior Axillary Line, vertical line along the anterior axillary (underarm) fold
- Ambient Assisted Living programme, of the European Commission
- American Arena League, an indoor football league
- Afade language, spoken in Cameroon and Nigeria (ISO 639-3:<code>aal</code>)