LTU International Airways, usually shortened to LTU and legally incorporated as LTU Lufttransport-Unternehmen GmbH, was a German leisure airline headquartered in Düsseldorf. It operated medium and long-haul routes and maintained hubs in Düsseldorf, Munich and at Tegel Airport in Berlin. LTU was acquired by Air Berlin in 2007. Use of the LTU brand ceased in 2009, and LTU itself was dissolved by April 2011.

Düsseldorf is the capital city of North Rhine-Westphalia, the most populous state of Germany. It is the second-largest city in the state after Cologne, and the seventh-largest city in Germany, with a 2022 population of 629,047.