Aer Lingus 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".