Aer Lingus (/ˌɛər ˈlɪŋɡəs/ air LING-gəs; an anglicisation of the Irish aerloingeas [ˌeːɾˠˈl̪ˠɪɲɟəsˠ], meaning "air fleet") is the flag carrier of the Republic of Ireland. Founded by the Irish Government, it was privatised between 2006 and 2015, and it is now a wholly owned subsidiary of International Airlines Group (IAG). The airline's head office is on the grounds of Dublin Airport in Cloghran, County Dublin.
Formed in 1936, Aer Lingus was a member of the Oneworld airline alliance, which it left on 31 March 2007. After the takeover by IAG, it was expected that Aer Lingus would re-enter Oneworld. However, at a press briefing on 15 November 2017, the airline's then CEO Stephen Kavanagh stated that the airline has "no plans to join Oneworld". The airline has codeshares with Oneworld, Star Alliance and SkyTeam members, as well as interline agreements with Etihad Airways, JetBlue Airways and United Airlines. Aer Lingus has a hybrid business model of low-cost and traditional carriers, operating a mixed fare service on its European routes and full service, two-class flights on transatlantic routes.