International Consolidated Airlines Group S.A., trading as International Airlines Group and usually shortened to IAG, is an Anglo-Spanish multinational airline holding company with its registered office in Madrid, Spain, and its corporate headquarters in London, England.

International Consolidated Airlines Group, S.A. (IAG) is a multi-national holding company with majority stakes in a number of large airlines including British Airways (100%), Iberia (100%) and British Midland International (BMI). IAG is a Spanish registered company with its corporate headquarters in London, UK.

The International Airlines Group (IAG) is one of the world's largest airline groups, comprising several airline brands and affiliated companies. IAG has a unique structure: Two full-service national carriers, British Airways and Iberia Two value carriers, Aer Lingus and Iberia Express Two low-cost carriers, LEVEL and Vueling