Compass Airlines, LLC, was a regional airline in the United States that operated from 2006 to 2020, when it shut down due to the COVID-19 pandemic. It was headquartered in Delta Air Lines Building C at Minneapolis–Saint Paul International Airport in Fort Snelling, Hennepin County, Minnesota; prior to December 16, 2009, it was headquartered in unincorporated Fairfax County, Virginia, United States, east of the Chantilly CDP. The airline launched inaugural service with a single Bombardier CRJ-200 aircraft under the Northwest Airlink brand between Minneapolis/St. Paul and Washington, D.C., on May 2, 2007. On August 21, 2007, it began flying two Embraer E175 76-passenger aircraft, and expanded to 36 aircraft by December 2008.

Trans States Airlines was a regional airline in the United States that operated from 1982 until 2020, when it shut down due to the COVID-19 pandemic. It was owned by Trans States Holdings and headquartered in Bridgeton, Missouri. At the time of its closing, the airline operated flights for United Airlines under the United Express brand. Trans States Airlines ceased all operations on April 1, 2020.