Comair was a wholly owned subsidiary airline of Delta Air Lines, headquartered on the grounds of Cincinnati-Northern Kentucky International Airport in Boone County, Kentucky, United States, west of Erlanger, and south of Cincinnati. Operating under the brand name Delta Connection, Comair operated passenger services to destinations in the USA, Canada, Mexico and the Bahamas. Comair and Delta Air Lines announced on July 27, 2012 that Comair would cease operations on September 29, 2012.