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Oscar Munoz, chief executive officer of United Continental Holdings Inc., speaks during a discussion at the U.S. Chamber of Commerce aviation summit in Washington, D.C., U.S., on Thursday, March 2, 2017. The 16th annual summit is entitled Technology, Innovation and the Future of Aviation. Photographer: Andrew Harrer/Bloomberg via Getty Images

Oscar Munoz, chief executive officer of United Continental Holdings Inc., speaks during a discussion at the U.S. Chamber of Commerce aviation summit in Washington, D.C., U.S., on Thursday, March 2, 2017. The 16th annual summit is entitled Technology, Innovation and the Future of Aviation. Photographer: Andrew Harrer/Bloomberg via Getty Images