British Midland Airways Limited (trading at various times throughout its history as British Midland, BMI British Midland, BMI or British Midland International) was an airline with its head office in Donington Hall in Castle Donington, close to East Midlands Airport, in the United Kingdom. The airline flew to destinations in Europe, the Middle East, Africa, North America and Central Asia from its operational base at London Heathrow Airport, where at its peak it held ca. 13% of all takeoff and landing slots and operated over 2,000 flights a week. BMI was a member of Star Alliance from 1 July 2000 until 20 April 2012.

BMI was acquired from Lufthansa by International Airlines Group (IAG) on 20 April 2012, and was integrated into British Airways (BA) by 27 October 2012. BMI's subsidiaries Bmibaby and BMI Regional were also purchased, although IAG did not wish to retain either. BMI Regional was sold to Sector Aviation Holdings in May 2012 and continues to operate, whereas Bmibaby closed down in September 2012.

British Midland Airways Limited held a Civil Aviation Authority (CAA) Type A Operating Licence, permitting it to carry passengers, cargo and mail on aircraft with 20 or more seats.

The airline dates back to 1938, when Captain Roy Harben established Air Schools Limited as a school for training pilots of the Royal Air Force Volunteer Reserve. Captain Harben had been approached by the Derby Corporation to run a new aerodrome under construction near Burnaston, which was planned to eventually become an airport. Sir Kingsley Wood, the Secretary of State for Air, officially opened the aerodrome as Derby Municipal Airport on 17 June 1939. Military flying training continued at the airport throughout the war.

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