In 2003, Mesa agreed to a service agreement with United for service out of their hubs at Chicago-O'Hare, Denver, and Washington-Dulles under the United Express banner. In October 2009 United decided to exercise its early termination option for the Dash 8 flying. The Dash 8 flying ended on April 30, 2010. Around the same time, United decided not to extend its CRJ200 operation and as a result, all of the Mesa CRJ200s (26 aircraft) flying under United Express were phased out by April 30, 2010. As of 2015, Mesa's United Express operations consisted of Embraer 175 flying out of the Houston hub and CRJ-700 flying out of the Washington Dulles hub.