<Tr> <Th> Headquarters </Th> <Td> Oak Creek, Wisconsin </Td> </Tr> <Tr> <Th> Key people </Th> <Td> Bryan Bedford (Chairman, President and CEO) Timothy E. Hoeksema (Former Chairman, President and CEO) </Td> </Tr> <P> Midwest Airlines (formerly Midwest Express) was a U.S. - based airline and, for a short time, an operating brand of Republic Airways Holdings based in Oak Creek, Wisconsin, operating from Milwaukee's General Mitchell International Airport . On April 13, 2010, parent company Republic announced that Midwest Airlines and Frontier Airlines would merge, with the Midwest brand disappearing in late 2011 . </P> <P> Midwest Airlines' final flight operated with a Boeing 717 - 200 and staffed with Midwest Airlines flight crews landed in Milwaukee on November 2, 2009 . Effective November 3, 2009, Midwest Airlines ceased to exist as an actual operating airline (allowing its DOT air carrier operator certificate to lapse). </P>

When did midwest express go out of business