Berlin Tegel Airport when Air Berlin entered into an agreement to assume Germania's management shortly before the death of that airline's founder, took over DBA and gained control of LTU. These events occurred in November 2005, August 2006 and March 2007, respectively. On 9 October 2017, Air Berlin announced termination of all of its own operations, excluding wetleases, by the end of the month leading to the loss of the airport's largest customer. In September 2017, a public quorum was held parallel to the German federal election to decide whether Tegel Airport should remain open once Berlin Brandenburg Airport started its operations. The
Airport city Airport city Airport city is the "inside the fence" airport area including the airport (terminals, apron, and runways) and on-airport businesses such as air cargo, logistics, offices, retail, and hotels. The airport city is at the core of the aerotropolis, a new urban form evolving around many major airports. The airport city model recognises that an airport can do more than perform its traditional aeronautical services, evolving new non-aeronautical commercial facilities, services and revenue streams. Airports are now routinely targeting non-aeronautical revenue streams amounting to 40–60% of their total revenues. Industry leaders and researchers share best practices on non-aeronautical revenues