Several major airline regional affiliates served Waterloo during the 1980s and 1990s via code sharing flights including American Eagle, United Express, Northwest Airlink, Trans World Express, Midway Connection, and Air Midwest with the latter operating as Eastern Express on behalf of Eastern Airlines and also as Trans World Express. Besides Aspen Airways, several regional and commuter airlines independently served the airport in the past as well with turboprop service including Great Lakes Aviation, Midstate Airlines and Mississippi Valley Airlines (MVA). In 1989 turboprops flew nonstop to Chicago O'Hare Airport, Chicago Midway Airport, St. Louis, Kansas City and Minneapolis/St. Paul and to several other cities. Types operated to the airport over the years included the ATR-42, Beechcraft 99, Beechcraft 1900C, BAe Jetstream 31, Convair 580, Embraer EMB-110 Bandeirante, Embraer EMB-120 Brasilia, Saab 340 and Swearingen Metroliner. In 2007 Northwest Airlink was the only airline at Waterloo with nonstop flights to the Northwest Airlines hub in Minneapolis/St. Paul on Canadair CRJ200s and Saab 340s.