Air Berlin GmbH & Co. Luftverkehrs KG (stylized as airberlin or airberlin.com) is Germany's second largest airline, after Lufthansa, and Europe's sixth largest airline in terms of passengers.

The airline operates an extensive network including holiday destinations in the Mediterranean region, the Canary Islands and North Africa as well as intercontinental destinations in Southeast Asia, the Caribbean and the Americas.

Air Berlin concentrates on serving major German and European cities to attract business traffic. A total of 23 German cities are served, more than any other airline. Its largest hub is Berlin-Tegel Airport, followed by Düsseldorf Airport. Other important destinations are the focus cities Nuremberg Airport and Son Sant Joan Airport, Palma.

On 26 July 2010, the Oneworld airline alliance announced that Air Berlin had been invited to join. Air Berlin became a member of Oneworld on 20 March 2012.

The airline is headquartered at the Airport Bureau Center in Charlottenburg-Wilmersdorf, Berlin. Air Berlin's parent company, airberlin group or Air Berlin GmbH, is publicly traded (FSE: AB1, ISIN is GB00B128C026).

Berlin ( /bɜrˈlɪn/; German pronunciation: [bɛɐ̯ˈliːn] ( listen)) is the capital city of Germany and one of the 16 states of Germany. With a population of 3.5 million people, Berlin is Germany's largest city and is the second most populous city proper and the eighth most populous urban area in the European Union. Located in northeastern Germany, it is the center of the Berlin-Brandenburg Metropolitan Region, which has 5.9 million residents from over 190 nations. Located in the European Plains, Berlin is influenced by a temperate seasonal climate. Around one third of the city's area is composed of forests, parks, gardens, rivers and lakes.

First documented in the 13th century, Berlin was the capital of the Kingdom of Prussia (1701–1918), the German Empire (1871–1918), the Weimar Republic (1919–1933) and the Third Reich (1933–1945).Berlin in the 1920s was the third largest municipality in the world. After World War II, the city became divided into East Berlin—the capital of East Germany—and West Berlin, a West German exclave surrounded by the Berlin Wall (1961–1989). Following German reunification in 1990, the city regained its status as the capital of Germany, hosting 147 foreign embassies.