U.S. airlines Seeking the Secret Cost Sauce: Investors are more focused than ever on revenue. But U.S. airlines aren’t forgetting costs. Share LinkedIn icon Twitter icon facebook icon Mail icon U.S. airlines Seeking the Secret Cost Sauce: Investors are more focused than ever on revenue. But U.S. airlines aren’t forgetting costs. May 2017 1 min read Seth Kaplan Subscribe Issue Overview Do U.S. airlines have cost concerns? You’d better believe it. Last quarter, the industry saw its operating expenses swell 11%, far above its 2% increase in revenues.