Air Berlin was a German airline founded in 1978, known for its low-cost flights across Europe and beyond. It operated a fleet of over 140 aircraft and served numerous destinations, making it one of the largest airlines in Germany. In 2017, Air Berlin filed for bankruptcy due to financial difficulties. The airline ceased operations shortly after, leading to the sale of its assets and routes to other carriers, including Lufthansa and easyJet. Despite its closure, Air Berlin remains a significant part of European aviation history.