Global airline titan IAG on Thursday said its chief executive Willie Walsh had quit, after a long stint that saw him oversee the group's creation and rapid expansion, and would be replaced by Luis Gallego, head of Spanish division Iberia.
Walsh stands down on March 26 ahead of retirement, the owner of British Airways said in a statement.
The announcement brings down the curtain on Walsh's 15-year career with BA and IAG. Starting as BA chief executive, he went on to oversee the 2011 merger of British Airways and Iberia.
IAG has since expanded to include Aer Lingus, Level and Vueling.
The Irishman also spearheaded a cost-cutting drive to compete with budget airlines, despite criticism from some quarters that this cheapened the brand of BA -- which once called itself the world's favourite airline.
Walsh, 58, was originally a pilot at Ireland's Aer Lingus but rose to become chief executive, before taking up the same role at BA in 2005.
"Willie has led the merger and successful integration of British Airways and Iberia," IAG chairman Antonio Vazquez said in Thursday's statement.
"Under Willie's leadership IAG has become one of the leading global airline groups."
"Iberia has been very much an equal partner in the group with BA in recent years so it makes sense that the Iberia chief Luis Gallego takes the reins."