Ryanair CEO Michael O’Leary warns that some of Europe’s airlines will go out of business if jet fuel prices remain elevated. “If pricing stays higher for longer this summer, we think a number of our airline competitors in Europe are going to face real financial difficulties,” O’Leary said on Tuesday, speaking to CNBC at a conference in Oslo. “Pricing has mushroomed since March. Jet A-1 was about $80 a barrel in March. It’s now $150.” Jet fuel prices in Europe have more than doubled since the U.