Mesa Airlines is a regional carrier headquartered in Phoenix, Arizona, operating as a contract carrier for major U.S. airlines under capacity purchase agreements. Founded in 1982, the airline has grown to become one of the largest regional carriers in the United States, flying under the United Express and DHL Express banners. The airline operates a modern fleet of Bombardier CRJ-700 and CRJ-900 regional jets, serving dozens of destinations across the continental United States. Mesa operates primarily under the United Express brand following the conclusion of its American Eagle partnership. Mesa Air Group, the parent company, is publicly traded on the Nasdaq stock exchange under the ticker symbol MESA. The company has faced financial headwinds in recent years, including bankruptcy proceedings, and has worked to restructure its operations and fleet to remain competitive in the regional aviation market.