Continental Express is the operating name of Expressjet for Continental Airlines. Expressjet is no longer wholly owned by Continental Airlines, and they only take regional jets now. They used to fly propeller planes, but Continental has Continental Connection airlines do that instead.
Expressjet hubs in Houston, Texas's George Herbert Walker Bush Intercontinental Airport, Newark, New Jersey's Newark Liberty International Airport, and Cleveland, Ohio's Hopkins International Airport. Expressjet operates Embraer ERJ-135's and Embraer ERJ-145's.
In the past, other airlines, such as Trans Colorado Airlines had used the Continental Express name. Trans Colorado Airlines was operating back when Continental had operations in Stapleton Airport in Denver, Colorado. They walked out of Stapleton due to high landing fees. Stapleton had been bulldozed in favor of Denver International Airport.