British Midland Airways Limited (trading as bmi or British Midland International) is an airline that was based at Donington Hall in Castle Donington in the United Kingdom, close to East Midlands Airport, before its acquisition by International Airlines Group (IAG) in April 2012. The airline flies to destinations in Europe, the Middle East, Africa and Central Asia from its operational base at London Heathrow Airport, where it held 11% of all take off and landing slots and operates over 2,000 flights a week.

BMI is now a wholly owned subsidiary of IAG, the owners of British Airways, who announced an agreement in December 2011 to buy the airline from previous owner Lufthansa. The deal, which completed on 20 April 2012, also includes subsidiaries Bmibaby and BMI Regional. BMI is expected to be fully merged into British Airways by the end of October 2012, at which point the use of the BMI brand will cease. Bmibaby and BMI Regional will not be integrated, as IAG do not intend to retain either. BMI was a member of the Star Alliance until it withdrew on 20 April 2012.

BMI may refer to:

An airline is a company that provides air transport services for traveling passengers and freight. Airlines lease or own their aircraft with which to supply these services and may form partnerships or alliances with other airlines for mutual benefit. Generally, airline companies are recognized with an air operating certificate or license issued by a governmental aviation body.

Airlines vary from those with a single aircraft carrying mail or cargo, through full-service international airlines operating hundreds of aircraft. Airline services can be categorized as being intercontinental, intra-continental, domestic, regional, or international, and may be operated as scheduled services or charters.

American aviation pioneers, such as Rufus Porter and Frederick Marriott, attempted to start airlines using airships in the mid-19th century, focusing on the New York–California route. Those attempts floundered due to such mishaps as the airships catching fire and the aircraft being ripped apart by spectators. DELAG, Deutsche Luftschiffahrts-Aktiengesellschaft was the world's first airline. It was founded on November 16, 1909 with government assistance, and operated airships manufactured by The Zeppelin Corporation. Its headquarters were in Frankfurt. The four oldest non-dirigible airlines that still exist are Netherlands' KLM, Colombia's Avianca, Australia's Qantas, and the Czech Republic's Czech Airlines. KLM first flew in May 1920, while Qantas (which stands for Queensland and Northern Territory Aerial Services Limited) was founded in Queensland, Australia, in late 1920.