Michael O'Leary is an Irish businessman best known as the CEO of Ryanair, a low-cost airline based in Ireland. He has played a significant role in transforming the airline industry in Europe by promoting budget travel and implementing a no-frills service model. Under his leadership, Ryanair has become one of the largest and most profitable airlines in Europe. O'Leary is known for his outspoken personality and controversial statements, often making headlines for his candid remarks about the airline industry and competitors. He has been a key figure in advocating for deregulation in the aviation sector, which he believes fosters competition and benefits consumers.