- Trans States Airlines was a regional airline based in Bridgeton, Missouri, USA. It operated as a feeder airline for United Airlines and American Airlines under the United Express and American Eagle brands, respectively. Trans States Airlines operated a fleet of regional jets, including the Embraer ERJ-145 and the Bombardier CRJ-200. The airline ceased operations on April 1, 2020, due to the impact of the COVID-19 pandemic on the aviation industry.